CONTENTS.

Page
I.—[Instruments employed in Glass-Blowing]1
[The Blowpipe]1
[The Glass-Blower’s Table]3
[The Eolipyle]5
[Blowpipe with Continued Current]5
[The Lamp]8
[The Candlestick]9
[Combustibles]9
[Oil, Tallow, &c.]9
[The Wicks]10
[Relation between the Diameter of the Beaks of the Blowpipe and the Wicks of the Lamp]12
II.—[Preliminary Notions of the Art of Glass-Blowing]16
[The Flame]16
[Places fit to work in]19
[Means of obtaining a Good Fire]19
[Choice and Preservation of Glass]22
[Preparation of Glass Tubes before heating them]25
[Method of presenting Tubes to the Fire, and of working them therein]26
III.—[Fundamental Operations in Glass-Blowing]30
[1. Cutting]31
[2. Bordering]34
[3. Widening]36
[4. Drawing-out]36
[5. Choking]37
[6. Sealing]38
[7. Blowing]39
[8. Piercing]46
[9. Bending]48
[10. Soldering]49
IV.—[Construction of Chemical and Philosophical Instruments]54
[Adapters]55
[Apparatus for various Instruments]55
[Archimedes’s Screw]57
[Areometers]71
[Barker’s Mill]57
[Barometers]58
[Cistern Barometer]58
[Dial Barometer]58
[Syphon Barometer]59
[Stop-cock Barometer]59
[Compound Barometers]59
[Gay-Lussac’s Barometer]60
[Bunten’s Barometer]61
[Barometer pierced laterally for Demonstrations]61
[Bell Glasses for Experiments]61
[Blowpipe]62
[Capsules]63
[Cartesian Devils]64
[Communicating Vases]65
[Cryophorus]55
[Dropping Tubes]65
[Fountains]66
[Fountain of Circulation]66
[Fountain of Compression]67
[Intermitting Fountain]68
[Hero’s Fountain]68
[Funnels]68
[Hour Glasses]70
[Hydraulic Ram]70
[Hydrometers]71
[Baumé’s Hydrometer]71
[Nicholson’s Hydrometer]73
[Hydrometers with two,] [ three,] or [four branches]74
[Manometers]74
[Mariotte’s Tube]75
[Phosphoric Fire-bottle]75
[Pulsometer]75
[Pump]76
[Retorts for Chemical Experiments]76
[Rumford’s Thermoscope]77
[Syphons]78
[Spoons]80
[Spirit Level]80
[Test Glass with a foot]80
[Thermometers]81
[Ordinary Thermometer]81
[Dial Thermometer]83
[Chemical Thermometer]84
[Spiral Thermometer]85
[Pocket Thermometer]86
[Maximum Thermometer]86
[Minimum Thermometer]86
[Bellani’s Maximum Thermometer]87
[Differential Thermometer]87
[Thermoscope]77
[Tubes bent for various purposes]88
[Vial of the four Elements]90
[Water Hammer]91
[Welter’s Safety Tubes]92
V.—[Graduation of Chemical and Philosophical Instruments]93
[Of the substances employed in the preparation of these instruments]93
[Of Graduation in general]94
[Examination of the Bore of Tubes]95
[Division of Capillary Tubes into parts of equal Capacity]95
[Graduation of Gas Jars, Test Tubes, &c.]97
[Graduation of Hydrometers]99
[Graduation of Barometers]103
[Graduation of the Manometer]105
[Graduation of Thermometers]105
[Graduation of Rumford’s Thermoscope]112
[Graduation of Mariotte’s Tube]112

THE
ART OF GLASS-BLOWING.

I.—Instruments employed in Glass-Blowing.

On seeing, for the first time, a glass-blower at work, we are astonished at the multitude and the variety of the modifications to which he can make the glass submit. The small number and the simplicity of the instruments he employs, is also surprising. The blowpipe, or, in its place, the glass-blower’s bellows and a lamp, are indeed all that are indispensable.