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Updated: July 12, 2025
Warm the solution on the water bath for ten minutes longer, dilute the solution very cautiously by adding water in portions of 5 cc., stopping if the solution turns red. It is possible that no coloration will appear, in which case cautiously continue the dilution to 125 cc.
Chinese, use of flint tools by the; difficulty of distinguishing the races of the; colour of the beard in; general beardlessness of the; opinions of the, on the appearance of Europeans and Cingalese; compression of the feet of. Chinsurdi, his opinion of beards. Chlamydera maculata. Chloeon, pedunculated eyes of the male of. Chloephaga, coloration of the sexes in. Chlorocoelus Tanana.
This result may be attained by adding sodium phosphate, or, better still, by the addition of ammonium oxalate in great excess. In both cases the characteristic coloration from permanganic acid is developed by the action of the current at the positive pole; this, however, disappears in the direction of the negative electrode.
Speaking of these mountains in a general way, they are bare masses whose coloration trembles between misty blue and mauve according to distance, light, and hour of day. As building-stone, the rock imparts a grey-blue tint to the walls. The very flowers are blue; it is a peculiarity of limestone formation, hitherto unexplained, to foster blooms of this colour.
On adding the nitroprusside solution to a fresh portion of wool boiled with caustic soda, to dissolve out the sulphur, a splendid purple coloration is produced. Fur and hair would, of course, do the same thing. Lead solutions have been used for dyeing the hair black; not caustic alkaline solutions like this, however.
It would be out of place, despite its importance, to pursue the problem of the uric residues any further. Our subject is coloration. Let us return to it with the evidence supplied by the Sphex. Her almost transparent larva has the neutral tint of fluid white of egg.
The honey-cells were very large, and the brood-cells, which were small, were in a single instead of a double row. By this tree I came across an example of genuine concealing coloration. A huge tree-toad, the size of a bullfrog, was seated upright not squatted flat on a big rotten limb.
Evidently it is of no survival consequence whether the running deer displays a white or a black flag. Any competent observer of big game must be struck by the fact that in the great majority of the species the coloration is not concealing, and that in many it has a highly revealing quality.
That which I now obtained was a new one, and has been named Tanysiptera hydrocharis, but in general form and coloration it is exactly similar to the larger species found in Amboyna, and figured at page 468 of my first volume.
Prussia, numerical proportion of male and female births in. Psocus, proportions of the sexes in. Ptarmigan, monogamous; summer and winter plumage of the; nuptial assemblages of; triple moult of the; protective coloration of. Puff-birds, colours and nidification of the. Pugnacity of fine-plumaged male birds. Pumas, stripes of young. Puppies learning from cats to clean their faces.
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