PHOTOMICROGRAPHY AND THE PHOTOMICROGRAPHER 643 Figure oe Crystal Growth Hair of Bat x 31 $ x 55 Hair of Mouse x 315 T/S Hair of Elephant x6 Showing crystals forming on and around pollen grains, and finally incasing the pollen. Taken over a period of 3 mins. Kodak 0.250 emulsion. application of photomicrography is used, not because of any limitation in the amount of a sample, but because little or nothing can be seen by visual observation. Movir/g objects can be arrested and studied at a later date. What is hidden from the natural eye is very much alive, and it is the man behind the camera/microscope who can be the means of revealing the unseen indeed, he alone can bring the hidden detail to light (Fig. 8). The object being photographed is. subject to the illumination, and the illumination is subject to the photomicrographer. It is an important point in the photomicrographer's favour that he can select the field to photograph, and his choice may represent a form of

644 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Figure $ Gladosporium Penicillium herbarum x 450 brevicompactum and spores x 300 Aspergillus amstelodami x 450 Pollen of Iceland Poppy. x 450 All three specimens were growing on agar, positioned on a microscope slide and photo- graphed in their natural state--unstained. Photographed on orthochromatic material with blue filter. research which has taken months or years to produce. However, whether he makes a choice, or whether the choice was made for him, he does his best to provide an honest recording of the substance before him {Fig. oe). I have known operators to photograph only part of what was seen. What they did not want to see they did not produce. This type of reporting may fit neatly into a particular pattern at the time, but it may also mislead and produce setbacks at a later date. I can myself remember being com- missioned to photograph some graded sand for advertising purposes in brochures. Being honest as to what I could see I included all sizes in each of the grades, and supplied proof prints. These, however, were returned to me