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vitamin B , deficiency 468 known as the extrinsic factor - a factor from outside the
body that aids in the development of red blood cells in higher animals . Vitamin
B12 was isolated in 1948-49 . The vitamin , which is unique in that it contains a ...
Diseases of Animals 875 Table 6 : Some Common Diseases of Poultry name ( s )
of disease causative agent nature of disease Coccidiosis Blackhead (
histomoniasis ) Psittacosis ( ornithosis ) Avian lymphomatosis protozoans ( e.g. ,
972 Draft Animals drew stagecoaches and post chaises between cities , ponies
were hitched to wagons in coal mines and traps on country roads , and light
horses pulled innumerable cabs , carriages , carts ( later , even fire engines and ...
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LibraryThing ReviewUser Review - keylawk - LibraryThing
This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review