raduation, 72-76

Haste, Source of Failure, 103

Heat reflector, asbestos, 7.

Heating, intensive, 7, 57.

Heating precautions, 12, 98

Joining dissimilar glass, 22.

Joining glass to metal, 76.

Joining tubes, 16, 94, 100.

Knife, Glass blower's, 7, 99.

Lenses, grinding, 63.

Marking glass, 69.

Methods, analytic study of, 91, 93.

Oxygen for intensive heating, 57, 101.

Precautions and General Principles, 1, 97.

Pumps, Filter, 35.

Pumps, Sprengel, 49, 50.

Re-entering branch, 40.

Reflector of heat, asbestos, 7.

Rod, uses and articles from, 17, 25, 27, 28.

Rod, blowing to hollow, 17, 25, 26, 91.

Scrap glass, working, 90.

Sealing tubes, 12, 13, 14.

Sealed tubes for pressure, 15, 16.

Sealing in of Electrodes, 42, 97.

Seals, internal (airtraps), 32, 102.

Silvering glass, 77.

Soldering glass, 76.

Soxhlet-tube, 40.

Spirals, 23, 95.

Spray arrester, 34.

Spray producers, 36.

Sprengel pumps, 49, 50.

Spinning glass, 51.

Stopcocks, 60, 66.

Stoppering, 63.

Stirrers, 28, 29.

Summary as to precautions and failures, 97.

Taps, 60, 66.

Thermometers, Various, 44-49.

Thermo-regulator, 24.

Thistle Funnel, 23.

Tools, Various small, 7.

Turn-pins, 7, 8, 99.

Turning out open ends, 14, 99.

PRINTED IN GREAT BRITAIN BY
W. JOLLY & SONS, LTD., PRINTERS, ABERDEEN.

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Bernard D. Bolas

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