Excerpt from The Application of Photography to Micrometry: With Special Reference to the Micrometry of Blood in Criminal CasesThe number of corpuscles 011 each negative ranges from 50 to 140, except on a single negative, which presents only 26 corpuscles. This happens to be a group of large corpuscles the mean diameter of which is 343 millionths of an inch, being the largest average diameter obtained on any negative. The smallest average was 309 millionths of an inch, being the mean of 90 corpuscles.The measurements of dog's blood are from thirteen negatives, taken from five drops of blood, each from a single individual. The largest corpuscle measured was millionths of an inch in diameter, the smallest, 237 millionths of an inch. The negatives contain from 80 to 175 corpuscles each, the total number of corpuscles measured being 1571. The largest average size for any negative was 340 millionths of an inch, being the mean of 100 corpuscles. The smallest was 296 millionths of an inch, being the mean of 111 corpuscles. It will be observed that on seven of the negatives of dog's blood the corpuscles have an average diameter smaller than the corpuscles on any of the negatives of human blood, while 011 the other six the average size of the corpuscles proves to be larger than the smallest average for human blood, and the largest average on any one negative of dog's blood exceeds that for any nega tive of human blood except the very largest. I call attention also to the very diverse averages obtained with both the human and dog's blood from different parts of the very same drop.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.