2514 



Journal of Applied Microscopy 



this latter case the effect is poor, and the case is evidently constrained to a pur- 

 pose for which it is unadapted. 



Very critically considered the A case does not appear to the writer desirable, 

 as all the purposes it subserves can be more legitimately secured by some type 

 of a hollow parallelipipedon or cell, the ultimate and artistic structural unit of 

 the museum. 



Fig. G7. — Specimen Case — Butterflies in A case. 



The A cases are constructed of a metal frame, stiffening a wooden sheath, 

 the doors on the side may be one (the whole length) or two (half-length), they 

 open upward, are hinged at the top, and in the top a " light " is inserted. 

 Dimensions for a typical case are as follows (compare Fig. 66) : a-b, 2 ft. 9 in.; 

 c-d, 3 ft. 4 in.; c-e, 2}< ft.; f-a, 3 ft. Length, eight feet, eleven inches. 

 American Museum of Natural History. L. P. GrataCAP. 



The method adopted by Dorset in using eggs as a medium for the cultivation 

 of the tubercle bacilli is to mix together the white and the yolk in test- 

 tubes, and then, by keeping the material in the tubes at 70° C. for four hours 

 upon two successive days, it is both sterilized and coagulated. The use of the 

 yolk alone does not produce a very abundant growth of the tubercle bacilli, and 

 the use of the white alone is quite unsatisfactory. A couple of drops of steril- 

 ized water is placed in each of the tubes to moisten the material, and then the 

 tuberculous matter is inoculated upon the surface of the medium. An abundant 

 and satisfactory growth has been obtained from tuberculous material from 

 guinea-pigs.— y^'/z'/v/rt'/ of State Medicine. 



