OCR Text |
Show Photographing the Little. The art of photomicrography has made a great advance through the application ap-plication of the electric arc light. Heretofore it has been very difficult to make good photographs of mhiute I objects magnified more than one I thousand diameters because the oxy-hydrogen oxy-hydrogen light employed to illuminate the objects was not sufficiently uniform uni-form in intensity. With the electric arc light this difficulty has been largely overcome, and fine photographs have been made of objects magnified five thousand diameters. Microscopy Is far ahead of astronomy as-tronomy in the magnifying powers that it can employ. It is seldom that a power of so much as one thousand diameters can be usefully applied with a telescope, and In photographing the heavenly bodies comparatively slight magnification can be used. A photograph photo-graph of the moon with a magnifying power of five thousand diameters would be n wonder Indeed. |