ed glass, for example, shows the which is well spoken of by French technical writers. land concludes from his experiments that, although rings as alternately red and black. The principle of the appliance is to impart a rotatory the production in large quantities of sterilized pota- The device for… … and is projected against the inside of the outer cylin- mechanism, when, by means of a firing lever, the: valve MOUNT OF NEWTON’S RINGS FOR THE MICROSCOPE. is made to deliver a quantity of air from the reservoir der, over which it spreads as a thin coating. The mo- tions of the air and water are as…
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