Laboratories, their planning and fittings . oinery work but may also have toserve for the mounting of specimens, in which case it should be large enoughto admit of a separate bench in a good light for this purpose. Not onlymuch time but often money may be saved by training an assistant in workof this character, and if he is expected to display interest in it, properfacilities should be provided. Such work includes not only the erection andarticulation of skeletons and the bottling of specimens in spirits, but suchmatters as the arrangement of specimens in their natural environment, whichgives
Laboratories, their planning and fittings . oinery work but may also have toserve for the mounting of specimens, in which case it should be large enoughto admit of a separate bench in a good light for this purpose. Not onlymuch time but often money may be saved by training an assistant in workof this character, and if he is expected to display interest in it, properfacilities should be provided. Such work includes not only the erection andarticulation of skeletons and the bottling of specimens in spirits, but suchmatters as the arrangement of specimens in their natural environment, whichgives scope for considerable artistic skill. Tank Room.—The development of small amphibious creatures andtheir preservation alive for future use requires small tanks with water supplyand often some aerating device to keep the water fresh. Two rooms mayindeed be desirable, one to act as a store which may be in the basement, theother as a working room for observations. The latter will require tanks Tlll«: RKQUIRKMKNTS OF BIOLOGY AND GEOLOGY 107. which in;iv take the form of large shallow sinks of glazed stoneware, or woodlined with sheet metal, or large bell-shaped glass jars may be 64 illustratesthe tank or aijuariiimmanufactured by theKewaunee Co, , which con-sists of two compart-ments of glass andalberene stone, 50ins. by 24 ins. bv i 5ins., on a table 58ins. by 32 ins. by 30 .MXhWj-ins. high. In the Fig. 64.—Tank Biology Table. laboratory of Prof. MacBride, who has actually succeeded in breeding sea-urchins, the water is kept in slow constant movement by the stirring actionof glass plates attached to a lever worked by an intermittent syphon. If acompressed air service is available air may be forced into the water through a rose opening. At Cambridge ithas been found possible to keepmarine animals in filtered sea waterfor three months without renewingthe supply. The tanks used in thenew laboratories at Cambridge for thepurpose of storage are formed as aco
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