Manipulation of the Microscope (Paperback)

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: REQUISITES FOR WORK. It is the intention to make such recommendations in this chapter which, if not absolutely necessary, will be found convenient and will aid in facilitating work. One of the first requisites for the proper use of the microscope, is a thorough knowledge of its parts and an acquaintance with the optical principles involved. For this purpose the writer earnestly requests a perusal of the preceding pages, and is convinced that in cases where no previous knowledge of the instrument has existed, work will be done with far more ease, in much less time, and with a greater degree of satisfaction. Ignorance of the instrument's capacity may lead to an idea that it is inferior and thus be the means of its final abandonment; and in place of the anticipated pleasure there may arise a feeling of bitterness and disappointment for all future with everything connected with it. There are innumerable cases of this kind and they have induced a belief that it is difficult to acquire a practical manipulation of the microscope, whereas such is not the case when a limited time, properly applied, is devoted to it. Working Table.?A firm table should be used, preferably one with three legs, as this will always be firm no matter how uneven the floor is, and if it canbe arranged, should be devoted to this purpose only. One with a round or square top of three feet provides ample room. Although not necessary, a table with a revolving top, provided with clamp, is very convenient, as with this two or more persons may make observations without changing their seats. A very neat arrangement for a table top is that suggested and used by Dr. J. E. Reeves. He places upon an ordinary table three or four thicknesses of white paper and upon these a plate of polished glass as large as the top ...