Past exam of the medicine course of the University of Oxford / 1867 / Second examination / Forensic medicine and hygiene (No. IV.)

Original volume: Examination papers for the Degree of Bachelor of Medicine by the University of Oxford (1864–1867), scanned PDF page 95. Open the original paper in the scanned volume.

Original questions are transcribed from the public-domain edition. Credit: Wellcome Collection; original supplied by Royal College of Physicians, London. Source and public-domain rights statement.

What proceeding would you adopt to ascertain if a stain was that of human blood or not?

First record the position, extent, colour and underlying material of the stain. Keep a portion untouched, take a small scraping or cutting for examination, and test an unstained portion of the same material alongside it. The comparison is important: a coloured fabric, iron oxide or a vegetable colouring substance may resemble dried blood, and the material itself can interfere with a chemical test. Brown colour alone proves nothing.

For an examination practicable in 1867, use complementary observations:

These observations should agree before the examiner expresses a positive conclusion. Failure to recover intact red blood cells does not exclude an old bloodstain; conversely, a colour reaction without suitable controls is weak evidence. A defensible period report would distinguish “blood identified, consistent with mammalian origin” from “human blood proved.” The second conclusion does not follow from the first.

For comparison, later precipitin tests use antibodies against human proteins to investigate species of origin. Modern DNA profiling can investigate the donor, subject to preservation and contamination limits. These are later developments, not procedures to attribute to an Oxford candidate in 1867.^[ref]

What measures are required by our law before a person can be confined in a lunatic asylum ?

For an ordinary private admission in England and Wales in 1867: a prescribed written reception order and statement, together with two independent medical certificates based on separate personal examinations. Pauper admissions and certain exceptional admissions had different statutory routes. The expressions “lunatic” and “pauper” below are the historical statutory categories.

The relevant law was the Lunacy Act 1845, the Lunatic Asylums Act 1853, the Lunatics Care and Treatment Act 1853, and the Lunacy Acts Amendment Act 1862. The later Lunacy Act 1890 must not be read backwards into this examination.

For a private patient entering a licensed house or registered hospital, the 1853 care-and-treatment statute required the prescribed order and particulars, with certificates from two qualified practitioners. Each must examine the person separately within seven clear days before reception; partners and assistants could not certify together. Each certificate must distinguish personally observed facts indicating the alleged mental disorder from facts reported by others: hearsay alone was insufficient. The statute also excluded specified relationships and interests connecting certifiers with the institution or order-maker. The exceptional single-certificate route required the special circumstances to be recorded and two further independent certificates within three clear days of reception.^[ref]

The 1862 amendment added that the private order-maker must have seen the person within the preceding month and record when and where. The order ceased to authorize reception after one calendar month. Additional disqualifications concerned financial interests and institutional medical attendants. Where possible the admission order should name and give the address of a relation. The principal admission documents for private patients had to reach the Commissioners within one clear day; the subsequent medical statement remained a separate return. A person already found subject to the relevant jurisdiction by formal inquisition had a distinct route through the appointed committee's order and the court documentation.^[ref]

For a county or borough asylum, the Lunatic Asylums Act 1853 supplied the corresponding private-patient procedure. For a pauper patient, the ordinary route involved official inquiry and a reception order, normally by a justice, supported by one medical certificate and the prescribed particulars. The statute also provided a route involving an officiating clergyman with a relieving officer or overseer, subject to its conditions. The medical examination must again be within seven clear days before reception. Thus “two doctors and a relative's request” is not a complete account of every admission.^[ref]

The practical sequence is to ascertain the applicable legal category, arrange the required examinations and order, check qualifications, independence, facts, dates and signatures, and deliver the documents to the authorized institution before reception. An unsupported allegation by a relative or a bare medical assertion supplies none of these safeguards. This is an account of Historical English asylum admission, not a statement of present admission law.

How would you ascertain from the aspect of a wound in a corpse whether it had been inflicted during life ?

Examine the whole body before disturbing the wound, recording its situation, dimensions, margins and relation to damaged blood vessels. Then expose the wound track by careful dissection. An injury received while the blood circulation was active may show substantial hemorrhage, blood infiltrating the surrounding tissue, and adherent blood clots. Infiltration is more informative than loose blood merely lying on the surface: serial cuts can show whether blood has penetrated the tissue rather than simply coated it.

The interval of survival changes what can reasonably be expected. If the person survived long enough, surrounding inflammation, cellular reaction, formation of granulation tissue, or an established scar is evidence of a process that began during life. Such findings can make the conclusion much stronger than the appearance of a fresh cut. They do not furnish a universal clock: wound healing varies with site, severity, health and environment.

A post-mortem cut will often have relatively pale margins and little infiltration, although it can gape because skin and other tissues are elastic. Blood may still escape from a recently dead body, particularly from dependent or congested parts, and coagulation can occur around the time of death. Livor mortis can resemble bruising, while drying and putrefaction alter colour and consistency. A body moved, compressed or subjected to attempts at resuscitation presents further opportunities for artefact. Therefore neither “it bled” nor “the edges retracted” establishes that the wound was inflicted during life.

For modern corroboration, sample the margin, underlying tissue and an uninjured comparison site for histology, interpreting inflammation and other markers in the context of the whole examination. A primary study of decomposed forensic cases illustrates the use of immunohistochemistry while explicitly warning that extravasated red blood cells alone do not reliably establish wound vitality.^[ref]

Consequently, a rapidly fatal wound may be impossible to distinguish confidently from one inflicted immediately after death by gross aspect alone. Absence of developed inflammation is expected when survival was extremely brief; it is not proof of post-mortem injury. The answer should express the degree of support, rather than force an unwarranted yes-or-no conclusion.

What are the symptoms of poisoning by Strychnia ?

Strychnine poisoning characteristically produces rapidly recurring, intensely painful generalized muscle spasms, precipitated by slight sensory stimuli, with consciousness initially preserved. “Strychnia” is the historical name for strychnine.

Following ingestion, manifestations commonly begin within roughly 15–60 minutes, although exposure route and amount alter the time course. Early features include apprehension, restlessness, heightened sensitivity and stiffness or twitching of the muscles, especially about the neck and back. The patient can then develop violent, generalized muscle spasms with rigid limbs and backward arching of the trunk, termed opisthotonus. Jaw closure and contraction of the facial muscles can produce trismus and risus sardonicus. The respiratory muscles may become fixed, causing difficulty breathing and cyanosis.^[ref]

Attacks may be triggered by touch, a noise, light or attempts to move the patient. During the intervals the muscles may relax substantially, and the patient may remain lucid and fearful of the next attack. Repeated contractions cause exhaustion, sweating and hyperthermia; severe cases develop acidosis, rhabdomyolysis and acute kidney injury. Death can result from respiratory failure. Consciousness can be lost late through hypoxia, so preserved awareness is a characteristic early clue, not an invariable requirement.^[ref]

This pattern helps distinguish the condition from many epileptic seizures, in which impaired awareness and a postictal state are common, and from tetanus, whose evolution is usually slower and whose rigidity tends to persist between attacks. The distinction is not absolute and symptoms alone do not prove the particular poison. A convincing forensic diagnosis combines the clinical sequence and exposure history with toxicological analysis.

The modern explanation is blockade of inhibitory glycine receptors in the spinal cord and brainstem, leaving reflex motor activity excessively excitable. This explains why trivial stimulation can cause a massive contraction. The receptor explanation is a later interpretation of the recognizable nineteenth-century syndrome.^[ref]

What is the longest period of proved non-intercourse between a husband and wife legally consistent with the legitimacy of a child ?

English law in 1867 fixed no maximum period of proved non-intercourse compatible with legitimacy; an exceptional interval had to be assessed on the evidence of possible gestation in the particular case. The relevant interval runs from the last possible intercourse between the spouses to the child's birth. Proof of subsequent non-intercourse establishes that interval; it does not itself establish how long pregnancy could have lasted.

The contemporary eighth edition of the Encyclopædia Britannica, published in 1853–1860, expressly distinguished the English position from numerical limits in continental codes. Its article on forensic medicine states: “The law of England at present has no definite limit”; it then says that a case beyond the usual term would go to a jury. This directly answers the legal question: there was no prescribed number of days that resolved every case. Medical evidence about the credibility of the claimed gestation informed the tribunal's decision about the child's status.^[ref]

To see what “consistent” means, distinguish the ordinary duration of pregnancy, the range alleged in exceptional medical reports, and a legal decision about a particular child. An accepted exceptional interval would show that the ordinary duration was not an inflexible rule; it would not establish a maximum for every subsequent case. For illustration, the later historical account in Legal medicine by Charles Meymott Tidy (volume 3) reports an English decision, dated there to 1834, allowing legitimacy after about 42 weeks, or 294 days, from last intercourse. This is a retrospective textbook report, not independent verification of the original judgment or proof of a longest accepted interval. The legal answer rests on the contemporary statement of the English rule, rather than on that numerical example.^[ref]

The medical evidence also requires care over the starting event. A period counted from the last menstruation is not the same measurement as a period counted from intercourse, and neither directly observes the instant of fertilization. Modern gestational age conventionally counts from the first day of the last menstrual period; early ultrasonography provides a more accurate check than menstrual recall alone. It would be misleading to combine historical figures with these different starting points into a single supposedly proved maximum.^[ref]

The absence of a predetermined English maximum did not make every length of separation legally acceptable or biologically possible. A claimed prolonged pregnancy still required credible evidence, and a nineteenth-century finding about legitimacy does not validate an extraordinary pregnancy length as a modern scientific observation. In historical legitimacy and prolonged gestation, the legal rule, the determination in an individual case, and the observed biological interval must be kept distinct. Establishing a unique longest reported case is a separate historical inquiry; it is not necessary to answer that English law prescribed no fixed maximum.

What are the ascertained causes of Typhoid Fever?

For an answer situated in 1867, the important established observations were the association of outbreaks with polluted drinking supplies, the spread from particular cases, and the infectious importance of intestinal discharges. A leaking privy or cesspool near a well, contamination of a stream used for drinking, and household transfer from soiled material to food offered intelligible chains of transmission. Merely saying “defective drainage” names a circumstance; the explanation must show how material from an infected person reaches someone else.

William Budd had already published a particularly clear argument in 1861: the intestinal discharges of sufferers conveyed the specific infectious material, and sewers propagated the disease because they received those discharges. He rejected the claim that inability to trace a previous case established spontaneous generation from putrefaction. This is a contemporary argument that an informed 1867 candidate could have used; it does not require importing a discovery made decades afterwards.^[ref]

The distinction between observation and interpretation matters. Some contemporary writers treated decomposing excreta or “sewer air” as a direct fever-producing agent, under the historical pythogenic theory of typhoid. The observed association of typhoid fever with foul drains did not prove that theory: the same drain could contaminate water, hands or food. Nor should typhoid fever be conflated with typhus, despite the similar names.

In present terms, the causal organism is Salmonella Typhi, a human-associated bacterium. People ill with typhoid fever and people who continue carrying the bacterium after recovery can contaminate food or water. Faecal–oral transmission explains why someone need never enter a sickroom to become infected. The contaminated material may pass through a drinking supply, food handling, or hands rather than by direct contact with the original sufferer.^[ref]

To investigate an outbreak, construct a dated list of cases, compare drinking and food exposures among affected and unaffected households, trace wells and pipes relative to drains, and ask whether cases follow distribution of a common supply. A supply-specific pattern supports a transmission hypothesis more strongly than a general complaint that a neighbourhood smells bad. Modern bacterial culture and organism comparison can supplement this epidemiology, but a modern laboratory identification must not be represented as an accomplished experiment in the 1867 paper.

What is the best mode of removing human excrements and other waste organic matter in an urban population ?

A workable scheme has to deal with both transport and final disposal. At the house, collect excreta in suitably flushed closets; use sound, impermeable drains with sufficient fall and provision for inspection and cleaning. Traps interrupt communication between house air and sewer air, while appropriate sewer ventilation prevents the system from discharging its atmosphere into dwellings. Keep the drinking supply physically protected from drains and leakage. A sewer that carries filth away from a courtyard but releases it beside a downstream drinking intake has merely moved the danger.

Convey sewage promptly to a controlled outfall or disposal site, with pumping where the terrain requires it. One contemporary proposal was application to land by sewage irrigation, using land and drainage arranged to receive the flow rather than allowing stagnant pools. A period report on sewage irrigation at the Cumberland Asylum appeared in January 1866, establishing that this was an available contemporary option, not a later technology projected into the examination.^[ref]

The word “best” needs conditions. Water-carriage sewerage requires a dependable supply, engineering maintenance and an acceptable destination for the effluent. Where these cannot be provided, watertight removable receptacles with organized frequent collection can be preferable to an unreliable water system. Dry-earth sanitation was another period alternative, useful where systematic collection and suitable dry material could be assured. Neither an overflowing cesspool nor occasional removal after a nuisance has developed is a satisfactory urban service. Contemporary proposals competed over these very questions; there was no demonstrated single apparatus suitable for every town.^[ref]

Other waste organic matter requires a parallel service: covered receptacles, frequent collection of kitchen refuse and animal waste, cleaning of markets and slaughtering places, and controlled treatment or disposal away from dwellings and drinking supplies. Bulky refuse should not be pushed into house drains and allowed to obstruct them. The practical objective is continuous removal from contact with people, rather than accumulation followed by attempts to suppress the smell.

The present public health qualification is crucial: sanitation includes safe containment, emptying or conveyance, treatment and final disposal or controlled reuse. Neither chemical deodorization nor the apparently clear appearance of an effluent establishes removal of pathogens. Land application of untreated sewage must therefore not be presented as automatically safe for workers, crops or downstream users. Modern evaluation follows the whole service chain and its exposure routes.^[ref]

What diseases are engendered by impurities of Air? What are the most usually found impurities in the Air? And how do you detect them ?

The nineteenth-century phrase “impure air” mixed several different mechanisms. Irritant smoke and dust can damage the respiratory system; toxic gases can poison without causing an infection; crowded, poorly ventilated rooms can increase exposure to infectious material. The historical miasma theory treated foul emanations much more broadly as generators of disease. In particular, the smell of sewage does not itself establish the cause of typhoid fever, cholera or malaria.

For the first part, important real consequences include the following:

For the second part, ordinary outdoor air already contains nitrogen, oxygen, a small amount of carbon dioxide, and variable water vapour. Their presence alone is not evidence of pollution. In a smoky industrial town, soot, mineral dust, products of fuel combustion and sulfur dioxide would be particularly relevant. In occupied rooms, expired carbon dioxide, water vapour and suspended biological material increase unless removed. Decomposing wastes may contribute Ammonia, hydrogen sulfide and other volatile products. The actual mixture depends on sources, ventilation and weather.

For the third part, begin with a defined sampling site and time, record occupancy or industrial activity, and compare with a suitable reference. A volume of air, not simply an unrecorded sniff or a discoloured paper, is the basis of quantitative comparison. Methods available by 1867 include:

The chemical equations underlying two of these qualitative tests areHere the precipitates are barium carbonate and lead sulfide. For the baryta absorption method, in an ideal, fully captured sample with no interfering acid gases, the difference between blank and sample acid requirements satisfieswhere $c_{{\mathrm{H}}^{+}}$ is the amount concentration of titratable acid equivalents and the volumes refer to titration of the entire corresponding absorbent portions; any aliquot requires its scale factor. The factor two follows from the two acid equivalents neutralized per mole of barium hydroxide. This calculation assumes that the barium carbonate precipitate is excluded from the residual-base determination; dissolving it again with the titrant would invalidate the inference.

Odour, visible smoke and room stuffiness are useful prompts to investigate, but no single smell, carbon dioxide value, microscopic field or chemical colour test establishes that air is free of harmful impurities. Specify which material was measured and which uncertainty remains.