XVII. Note on high-power definition as illustrated by a compressed Podura -scale

Nothing in microscopic matters has ever afforded us such complete satisfaction as the following result of a very fine definition, accomplished by means of a Gundlach German 1/16 immersion lens, corrected by a new method, which Dr. Pigott at present delays publishing in the hope of further improvement, but which he is willing to exhibit at his house. APodura -slide, fortunately strongly protected with a thick glass cover, having accidentally been subjected to so considerable a pressure as to crush out the structure of a large scale, upon bringing it, by haphazard, into the field of view with a magnifying-power of about 2000 diameters, exhibited a structure indicated by the woodcuts here given, and drawn, in the presence of the writes, at Dr. Pigott’s house by the accurate artist Mr. Hollick, deaf and dumb and a rapid delineator without the camera.