the Minute Anatomy of Animals. 109 



spot, which others are without ; several are seen on their 

 Fig. 1. Fig. 2. 



edges collected into a pile ; of the two standing separately on 

 their edges, one appears concavo-concave, and the other con- 

 cavo-convex. B. The corpuscles after thirty hours' washing in 

 cool weather, the water having been changed until the whole 

 of the colouring matter was completely removed. These 

 membranous bases of the discs are extremely faint; but, as 

 shown at C, they may be rendered very distinct by corrosive 

 sublimate. D. Appearance of fresh corpuscles quickly after 

 treating them with dilute muriatic acid : six of them extend 

 horizontally across the figure. 



Fig. 2. Blood-corpuscles and fibrine of a Goose. At A is a 

 fresh unchanged corpuscle. B. Corpuscles after having been 

 washed precisely in the same way as those of the man, but in 

 colder weather ; four nuclei are seen, one of which appears 

 to contain minuter granules or nucleoli, and another has a 

 faint envelope. C. The washed corpuscles treated with io- 

 dine; some minute molecules adhere to the envelopes, and 

 the nuclei seem to contain nucleoli ; the two smaller corpus- 

 cles had remained three or four days in the water, at which 

 time many of the envelopes were destroyed, others made irre- 

 gular in size and shape, and the nuclei reduced to very minute 

 molecules. D. A fresh corpuscle treated with dilute muriatic 

 acid. E. Two oval nuclei obtained by dilute acetic acid from 

 fresh corpuscles, for comparison with the nuclei which appear 

 globular after having been kept in water, as seen at B and C. 

 F. Fibrine obtained from fresh blood by washing it in a linen 

 bag. G. The same fibrine, in which a multitude of oval par- 

 ticles, like the nuclei of the blood-discs, are shown by acetic 

 acid. 



On the Structure of Fibrine. 



In the English version of Gerber's Anatomy, I have de- 



