. The microscope and its revelations. would beof increasing valuethrough a lifetime? Almost any in-strument, howeverinferior, could be em-ployed successfullywith a 1-inch object-ive of low angle (togive it what has been• •ailed the needfulpenetration for his-tological subjects!) toobtain an image corresponding to a figure in a text-book of, say,a Malpighiaii corpuscle, or a section of kidney, brain, or spinal quality of a fine adjustment is never tinted by these means,tor, in point of fact, a delicate fine adjustment is not even write in the interests of microscopical res
. The microscope and its revelations. would beof increasing valuethrough a lifetime? Almost any in-strument, howeverinferior, could be em-ployed successfullywith a 1-inch object-ive of low angle (togive it what has been• •ailed the needfulpenetration for his-tological subjects!) toobtain an image corresponding to a figure in a text-book of, say,a Malpighiaii corpuscle, or a section of kidney, brain, or spinal quality of a fine adjustment is never tinted by these means,tor, in point of fact, a delicate fine adjustment is not even write in the interests of microscopical research. It certainlymay be taken for granted that the end sought is not simply to usethe microscope to verify the illustrations of a text-hook, a treatise,or a course of lectures ; without doubt it is a subsidiary purpose ; butthe larger aim is to inspire in the young student confidence,enthusiasm, and anticipation in the methods and promise of histologyand all that it touches. But for this there must be poh-nt inliti/ (\vith- M 2. FIG. 125.—Eoss-Zeiitmayer model (1878). 164 THE HISTORY AND DEVELOPMENT OF THE MICROSCOPE nut costliness) in tin- mechanical and optical character of the micro-scopes commended and approved. A lo\\ -priced students microscope of good workmanship and|,ei-fect design could easily lie devised if the demand for it , .piite recently a certain class of studentsmicroscopes havel>een improved greatly : this has been a concomitant of the science ofhaeterio|o-\. \\ Inch lias compelled the use of the sub-stage condenser.\\e lia\e said enough of the value of this instrument in a succeedingdiaptei-. until recent years histologists did not use it because itwas not used iii (iermany or with German instruments ! Its presentuse, nevertheless, has had the effect of improving the definitionobtained by t he objectives used by students generally. (Some whoperceive this, endeavour to attribute it to the improvement effectedin modern objectives, b
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
