Thin Glass Slide Research Articles

MELTING POINT APPARATUS

Main specifications · temperature range : 30°÷300° C, resolution ± 1°C · solid state heating unit · electronic thermoregulator with LCD display and temperature resolution of 0.1°C · fast temperature raising to the nearest expected melting point · change of set temperature possible during the test · auto cooling after the test ends · magnifying glass with light pack of 100 thin glass slides supplied as standard

On Hendry’s Crystals

ABSTRACT The author stated that four years since, in attempting to substitute fusion by the blowpipe for cement, in fixing their glass covers to slides, he noticed masses of crystals produced in the covers after the treatment, and believing them to be unkown, he named them after himself. To obtain the cry tais he heats a thin glass cover on a piece of mica, over a spirit-lamp, holding both with forceps; then quickly turning them to the side of the flame, applies a blowpipe, withdrawing the cover to the apex of the flame for a few moments. An examination with a 1 or -inch objective will then show the crystals. Similar results were observed in a thin glass slide, after a similar treatment, when examined with th objective. Specimens were sent with the paper, and the author suggests that it would be desirable to ascertain the chemical nature of the crystals, whether a silicate of lead or soda.