35.
---- Cleaning, 15.
Glass Tubes, Cutting, 26, 27, 28.
---- Piercing, 37.
---- Purchase of, 12.
---- Sealing, 32.
---- Sealing Hermetically, 58.
---- Sizes of, 82.
---- Welding or Soldering, 39, 62.
---- Widening the Ends of, 36.
Graduating Apparatus, 70.
Grinding Stoppers, 51.

Herapath's Blow-pipe, 6.
Hofman's Apparatus for Electrolysis, 59.

Inside Joints, 43.

Jets for Blow-pipes, 7.
Joints, Air-tight, 64.

Lead Glass, Method of Working with, 17.
Lead Glass, Blackening of, 17.
Light, Effect of, in Working, 3.
Line, to Divide into Equal Parts, 75.

Mercury Joints, Various, 64.

Non-splintering Silica, Preparation of, from Quartz, 88.

Ozone Generator, To Make an, 44.

Pastils of Charcoal, 11.
Piercing Tubes, etc., 37.
Platinum Electrodes, Sealing in, 38, 55.
Pointed Flame, the, 9.

Quartz Fibres, 94.

Rounding Ends of Tubes, 31.

Sealing or Closing Openings in Tubes, 32.
Side-tubes, Fixing, 41.
Smoky Flame, 10.
Soda Glass, Method of Working, 22.
Soldering or Welding, 39, 62.
Spiral Tubes, 56.
Stoppers, Making and Grinding, 51.

Table for Glass-blower, 3.
Taps, Vacuum, 65.
Thistle