ABSTRACT
Those who have orchards are no doubt often only too familiar with the red Aphides found in downy patches on the bark of the apple tree. These are coloured by a substance possessing somewhat remarkable properties, connecting it on the one hand with cochineal, and on the other with the hæmoglobin of the blood of vertebrate animals. It rapidly changes into a series of new products, which have remarkable optical characters, and are in some respects analogous to the colouring matters of oils and fats.
‘Quart. Journ. of Micros. Science,’ ×, 1870, pp. 400—402.
See my late paper, “On the Examination of Mixed Colouring Matters,” ‘Monthly Micros, journal,’ vol. vi, pp. 124—134.
“On Some Technical Applications of the Spectrum-microscop,” ‘Quarterly Journ. of Micros. Science’ (N.S.), Vol. IX, pp. 358 and 359.
