Science-gossip . Skews Xrr Caiikra, Extended. neatest, simplest, and smallest pocket-camera everput on the market for plates. AH cameras by thisfirm are Jjeautifully made and finished, and for asmall pocket-camera the new convertible Xit isall that can be desired. It can be fitted withany finder, lens, or shutter the purchaser maydesire, and also with dark slides or Xit cameras are made exceedingly light inweight, and are very portable. They are easilyadaptable for lenses of varying foci, and the Con-vertible Xit camera, fitted with the Zeiss Con-vertible Anastigmat lens, of e
Science-gossip . Skews Xrr Caiikra, Extended. neatest, simplest, and smallest pocket-camera everput on the market for plates. AH cameras by thisfirm are Jjeautifully made and finished, and for asmall pocket-camera the new convertible Xit isall that can be desired. It can be fitted withany finder, lens, or shutter the purchaser maydesire, and also with dark slides or Xit cameras are made exceedingly light inweight, and are very portable. They are easilyadaptable for lenses of varying foci, and the Con-vertible Xit camera, fitted with the Zeiss Con-vertible Anastigmat lens, of either two foci orthree foci, forms one of the most complete andall-round useful pocket-cameras that we have metwith in our experience. {To he continued.^ SCIENCE- GOSSIP. 119. •conducted by f. shillington scales, Flattening and Fixing Paraffin Sections?ON Slide.—In the Journal of Applied Microscopy Mr. B. M. Davis recommends the alcohol methodfor fixing paraffin sections on the slide in preferenceto the water or albumin methods, as it entails lessrisk of clouding in staining, and does not necessitatethe slides being absolutely clean. Mr. Davis tabu-lates the essential steps as follows : («-) Flood theslide with 70 to 85 per cent, of alcohol; arrangesections in order; hold slide a few inches abovesmall flame until sections are flattened, [h) Drainoff surplus alcohol (use filter-paper or cloth) ; re-arrange sections in desired positions, (c) Cut outtwo pieces of smooth blotting-paper same size asslide. Wet one in same strength alcohol as used in{a) and place over sections ; overthis put the otherpiece dry ; pass small rubber roller (such as usedby photographers) firmly over the dry blotting-paper two or three times; instead of using theroller,
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
