. Elements of histology. Histology. 12 Elements of Histology. [Chap. II. become smaller and spherical, but beset all over their surface with minute processes. This shape is called the horse-chestnut shape (Fig. 8, b, c). It is pro- f% f% bably due to the corpuscles losing carbonic acid, as its addition brings back their discoid shape and smooth circular outline. On ab- w w stracting the carbonic acid they return to the horse-chestnut shape. Water, acid, alcohol, ether, the electric current, and many other reagents, produce discoloration of the red blood corpuscles; the colouring matter — gener
. Elements of histology. Histology. 12 Elements of Histology. [Chap. II. become smaller and spherical, but beset all over their surface with minute processes. This shape is called the horse-chestnut shape (Fig. 8, b, c). It is pro- f% f% bably due to the corpuscles losing carbonic acid, as its addition brings back their discoid shape and smooth circular outline. On ab- w w stracting the carbonic acid they return to the horse-chestnut shape. Water, acid, alcohol, ether, the electric current, and many other reagents, produce discoloration of the red blood corpuscles; the colouring matter — generally the combination of the blood-colouring matter with globulin known as Jicemoglobin—becoming dissolved in the plasma. What is left of the corpuscles is called the stroma. In newts' and frogs' blood a separation of the stroma from the Fig. 8.—Human Red Blood Corpuscles. a, Creiiate ; 5, c, horse-chestnut shaped. o a o, O 9.—Eed Blood Corpuscles Man and Newt. nucleus plus haemoglobin can be effected by means of boracic acid (Fig. 9, b) ; the former is called by Briicke the Oikoid, the latter Zooid. This stroma contains amongst other things a good deal of para- globulin. The stroma of the corpuscles of amphibians is seen, under certain reagents, to be of a reticulated structure, but in the fresh state appears homo- geneous and pale. Discoloration of the blood cor- puscles can be observed to take place also in blood without the addition of any or with that of per- fectly harmless fluids, such as humor aqueus of the eye, hydrocele fluid, &c. The number of cor- puscles undergoing discoloration is, however, small. A, Human red corpuscles after the action of tannic acid: a, three red corpuscles, from which the haemoglobin is passing out; 6, Roberts's corpuscles. B, Newt's red corpuscles after the action of boracic acid: a, a corpuscle showing Brtickes' zooid and oikoid; 6, a corpus- cle showing the reticulated stroma; c, a corpuscle showing the reticulum in the nuc
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