The book Willats Scientific Manuals Etc was written by author T And R Willats Here you can read free online of Willats Scientific Manuals Etc book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Willats Scientific Manuals Etc a good or bad book?
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Smith, ' Microscopic J ournal/ vol. I. P. 48. 36 VIEWING AND ILLUMINATING made to fall obliquely, and in a direction at right angles by the lines to be viewed. " The diaphragm is often of great use in modifying the light and stopping such rays as would confuse the image ; but many cases occur when the effects desired are best produced by admitting the whole from the mirror. *' The most pleasing light for objects in general is, that reflected from a white cloud on a sunny day ; but an argand lam...p or wax candle, with the bull's eye lens, is the best substitute. " 24. TRANSPARENT AND OPAQUE OBJECTS. It is generally known that objects for the microscope are sometimes prepared as transparent, at others as opaque objects. In the former instance the light reflected from the mirror is made to traverse, or rather to pass directly through the object ; it is, in fact, viewed by transmitted light. In the latter, the light is thrown directly on the object. This may be accomplished in one or other of two ways.
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