Distinguished for his contributions to knowledge of medical and veterinary entomology and parasitology in Australia, and as a leader of energetic research teams in these fields. In his research, by a combination of laboratory experiments and field studies, he has made distinguished contributions to the understanding of several problems, notably the sheep blowfly, cattle tick and buffalo fly. He developed an entomological service for the first time in the Australian Aney (1940-45) and under his inspiring leadership results of great value to the allied forces in the Pacific were achieved. He personally added much to the knowledge of dengue fever and malaria and to the control and taxonomy of the insect vectors. More recently he has developed and intensified research in the borderline fields of zoology and medicine, more particularly into the study of animals and birds in relation to transmission of human infectious diseases.
Lecturer in Pathology 1928 - 1938. Pathologist, Royal Melbourne Hospital 1947 - 1950. Professor of Pathology 1951 - D.Sc. (Melbourne) - thesis: "Tissue Potentialities in Pathological States". Research included Endometriosis (particularly ovarian), Diseases of the Gallbladder, Neoplasms and other diseases of Synovial Membrane, various Bone conditions. Work included observation, application of special techniques (histological and histochemical) and experimental animal studies. Made first description of Golgi apparatus in Synovial Membrane (1935). Jacksonian Prize, Royal College of Surgeons 1930: "Pathology of Tumours of the 11 Ovary" 1933: "Rarefying Diseases of Bone Department of Pathology has developed a centre of Veterinary Pathology and of Chemical Pathology (including freeze-dry techniques and mitochondrial studies).
Distinguished for his contributions to applied mathematics and geophysics and particularly for his studies of the problem of heat-flow in inhomogeneous media.
Distinguished over the past 35 years for his outstanding contributions to the biochemistry of carbohydrate metabolism in the higher plants and animals and in microorganisms (1914-52).
His recent studies (1952-54) of the action of viral enzymes on mucoproteins have greatly clarified knowledge of the carbohydrate moiety of the glyco-proteins. Gottschalk isolated a nitrogen-containing substance set free from muco-proteins by the action of enzymes situated at the surface of the influenza virus and showed it to be 2, carboxy-pyrrole, an amino acid hitherto unknown in biological products. He has since shown that 2, carboxy-pyrrole is present in a great number of mucoproteins and absent from proteins which have no carbohydrate prosthetic groups; and has demonstrated that this amino acid forms the bridge between the carbohydrate and the peptid chain in the muco-proteins.
These studies have far-reaching fundamental significance in the realms of both protein chemistry and virology.
Over a period of 40 years, Dr. Bull, through his individual research and his association with other workers has made an outstanding contribution to the field of comparative pathology, bacteriology and parasitology. In particular may be cited his studies on infection by, and resistance to Corynebacterial ovis in sheep, his studies on bovine and mastitis (from which have largely arisen the now accepted methods of control of infection by Streptococcus agalactiae), the foundation work on myxomatosis and the causal organism (Myxomatosis cuniculi), and his contribution to the understanding of copper and molybdenum metabolism in sheep in relation to the problems of chronic copper poisoning and the toxicity of Heliotropium Europeum. Dr. Bull has made an outstanding contribution to the science and to the well-being of livestock industries of the Commonwealth.
