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By Bernard D. Bolas

Excerpt from A guide of Laboratory Glass-Blowing

To conceal the entire box of glass-blowing in a small guide will be very unlikely. to aim even a whole define of the equipment utilized in making advertisement gear might contain greater than may be undertaken with no omitting the basic information of manipulation amateur wishes. i've got, hence, restricted myself so far as attainable to such paintings as will locate functional software within the laboratory and should, i'm hoping, turn out of price to these whose pursuits lie therein.

The approach to remedy and a little disjointed kind of writing were selected completely with the view to economic system of area with out the undue sacrifice of clearness.

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Extra resources for A Handbook of Laboratory Glass-Blowing

Example text

A 12 MacLeod Pump. illustrated by b, Fig. 12. One form It of this is has the advantage LABORATORY GLASS-BLOWING that the 51 mercury reservoir may be allowed become empty without affecting the vacuum to in the vessel being exhausted. Glass. "Spinning" the use of suitable By quite possible to continuous thread of glass, which appliances, to it is have almost the softness threads flexibility of woollen fibre the constitutes a ; draw out a is so thin as and apparent mass of such " wool glass " of commerce.

A This Funnel. Thistle is made by thick-walled bulb on a glass tube, bursting a hole by heating and blowing, and enlarging the burst-out part by heating blowing a fairly and rotating against a turn-pin. Bending Glass Tube. Small tubing may be bent in a flat flame gas burner and offers no Large or thin-walled tubing should be heated in the blowpipe flame and a another zone of the tube, slight bend made just touching the first bend, should now be special difficulty. ; In this heated and another slight bend made.

Blown between two tubes by the A method given on page 22, the larger tube is then bulb is and the small piece of tube introduced the bulb after having been shaped as cut off into shown bulb is part The opening in the by b, Fig. 9. The sealed sealed as shown by bi. now heated and the bulb inclined in is downwards the until contact with the seal inner and is tube comes in fused in position. in order This operation requires some practice to prevent the inner tube either falling through the soft glass or becoming unsymmetrical.

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