64 



Journal of Microscopical Science. 



On Striated Muscular Fibres in tlie Skin of tlie Human Lip ; by 

 Dr. Woodham "Webb, London. 



Translations, Notes and Correspondence, and Proceedings of 

 the Microscopical Society. 



This is an average number. From the notes we select the fol- 

 lowing communication addressed to the editors, which may prove 

 interesting to microscopists among ourselves. 



" Allow me to call your attention, and that of your readers, to 

 a little contrivance of mine, which may be found useful." 



" It is a simple apparatus for illuminating objects under the 

 microscope, and will be found particularly of use when examining 

 Diatoraacese. Knowing that there are many microscopical obser- 

 vers like myself, not able to expend large sums in accessory ap- 

 paratus to the xnicroscope, I particularly recommend it to their 

 notice. 



It consists of a plate of glass, (fig. I) (an ordinary slider,) three 

 inches by one ; to one side of which, in the centre, is attached, by 



Fiff. 1..- 



Canada balsam, a piano convex lens (l) and this may be of about 

 one quarter-inch focus. Lenses of different powers can be used 

 although I have found one of half-inch, and one of a quarter-inch 

 focus to be the most useful. The way in which this is used is 

 seen in the first figure. The rays of light (r) fall on the lens (l) 



