128 



ANATOMICAL TECHNOLOGY. 



314. Glass Stoppered Jars. These are made to order by any extensive glass manu- 

 factory. The Dorflinger Glass Company, White Mills, Wayne Co., Pa., issue a price list of 

 51 different sizes, ranging from 2 x 1 in. to 22 x 7. 



315. Welted Jars (Fig. 33). With the specimen jars above described, the neck is 

 strengthened by a constriction. This involves one of two alternatives : either the speci- 

 men must be more or less compressed in 

 entering or leaving the jar, or the body 

 of the jar is needlessly large. With 

 some kinds of specimens these are not 

 very serious objections. But with brains 

 and embryos it is desirable that all pres- 

 sure should be avoided, and also that 

 they should be close to the side of the 

 jar. For such specimens the jars should 

 be of uniform diameter throughout, and 

 the requisite thickening at the mouth 

 may be gained by a welt. 



The size represented in Fig. 33 is 

 adapted to the brain or the heart of the 

 cat. Its inside measures are 4 cm. wide, 

 and 6 cm. to the lower border of the part 

 which is ground for the stopper. A 

 smaller size of the same height, but 

 only 3 cm. in diameter, is adapted for 

 either half of the brain. Both sizes are 

 made to order by Messrs. Whitall, Ta- 

 tum & Co. for $2.50 per dozen. 



316. Compressed Jars. The ordi- 

 nary circular jar is poorly adapted for the 

 display of flat specimens like frozen sec- 

 tions and some fishes. Messrs. Whitall, 

 Tatum & Co. have molds for two sizes of 

 compressed jars similar to the photog- 

 raphers' " bath." They are 15 cm. high 

 and 21 or 12 cm. wide. The larger cost 

 $12 per dozen, and the smaller $6. The 

 tops are level and ground off for thin 

 glass covers, which may be cemented on. 

 The covers cost a small sum in addition 

 to the price of the jars. 



FIG. 33. WELTED VIAL FOB THE BRAIN OR 

 HEART OP THE CAT ; slightly reduced ; 314 



317. Cleaning Jars. When large enough, jars should be 

 washed on the inside with a sponge. If they will not admit the 

 hand, the washing may be done with a swab made by tying a 

 sponge upon the end of a stick, or with the bottle brushes, one of 

 which is shown in Fig. 34. For long jars and large tubes there are 

 bottle brushes with long handles ; or a wire may be attached to the 

 handle of a short brush ; or the ring of the handle may be cut off, 



