. Carnegie Institution of Washington publication. 162 CRYSTALLOGRAPHY OF THE HEMOGLOBINS OF AVES. were made. After 48 hours at near a freezing temperature crystals appeared in one of the slides; they appeared to be reduced hemoglobin, but the deep-colored solution prevented spectroscopic determination. Later they improved somewhat and then appeared to be methemoglobin. They were very small—too small for obtaining an interference figure. They did not appear to dissolve readily when once formed, although they formed very slowly. Methemoglobin (?) of Struthio camelus. Orthorhombic: Axial ratio a
. Carnegie Institution of Washington publication. 162 CRYSTALLOGRAPHY OF THE HEMOGLOBINS OF AVES. were made. After 48 hours at near a freezing temperature crystals appeared in one of the slides; they appeared to be reduced hemoglobin, but the deep-colored solution prevented spectroscopic determination. Later they improved somewhat and then appeared to be methemoglobin. They were very small—too small for obtaining an interference figure. They did not appear to dissolve readily when once formed, although they formed very slowly. Methemoglobin (?) of Struthio camelus. Orthorhombic: Axial ratio a : b : 6 = : 1 : 6. Forms observed: Prism (110), base (001). Angles: 110 A 110=59° (normals); 110 A 001 =90°. Habit in small rhombic tables, very thin (text figures 31 and 32); occurring singly and not twinned, as is common in these rhombic plates. Pleochroism rather strong; a colorless, b yellowish-red, c deep red. Extinction was straight on all edge views and symmetrical on the base. Orientation of the elasticity axes is a =6, b=a, c=cl; plane of the optic axes is the macropinacoid. No interference figure could be obseved. CASSOWARY, Casuarius galeatus. Plate 8. The specimen was received from the National Zoological Park at Washington, District of Columbia. The blood was in the form of a small clot and was somewhat decomposed. Owing to the small quantity, it was only treated with ether to lake it, but it was at once converted into a jelly. After being ex- posed to temperatures ranging above and below the freezing-point for 24 hours, some fluid was ob- tained and 5 slides were prepared. The crystals formed gradually, but >J 3-1 were very poor. They did not appear to be very soluble. The spectro- scope showed a mixture of oxyhemoglobin and methemoglobin in the serum, and the crystals were rather brownish-red, but probably were oxyhemoglobin. The serum was highly colored, and photographs were obtained with some difficulty. The crystals formed mainly along the edge of
Size: 1621px × 1541px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegieinstitutionof, bookcentury1900, bookdecade1900
