“…Lightwood (1932) Boddaert (1950) Johnson and White (1952) Naylor (1955) Jeune and Beraud (1955) Wilkins (1957) Royer, Lestradet, and Habib (1958) Jeune and Muller (1 959) ThorBn and Sterky (1959) Charlas and Slomic (1962) Schmidt (1962) Hooft and Vermassen (1962) Tumay, Bilger, and Hatemi (1962) Richardson (1962) Bohm and Santoro (1964) Bateson and Chander (1965) Hagberg and Michaelsson (1965) Dubois et al (1966) Royer, Mathieu, and Balsan (1970) Gaucher et al (1971) per ml preparation per g of body weight). One animal from each group was killed by exsanguination under light ether anaesthesia on day 35.…”