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A Handbook of Laboratory Glass-Blowing   By:

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First Page:

A HANDBOOK OF LABORATORY GLASS BLOWING

To my Friends Eric Reid and Sidney Wilkinson

A Handbook of Laboratory Glass Blowing

BY

BERNARD D. BOLAS

WITH NUMEROUS DIAGRAMS IN THE TEXT

BY NAOMI BOLAS

[Illustration]

LONDON GEORGE ROUTLEDGE & SONS, LTD NEW YORK: E. P. DUTTON & CO. 1921

CONTENTS

CHAP. PAGE

I. Introduction and Preliminary Remarks General Principles to be observed in Glass Working Choice of Apparatus Tools and Appliances Glass 1

II. Easy Examples of Laboratory Glass Blowing Cutting and Sealing Tubes, Tubes for High Temperature Experiments Thermometer Bulbs, Bulbs of Special Glass, Pipettes, Absorption Bulbs or Washing Bulbs Joining Tubes, Branches, Exhaustion Branches, Branches of Dissimilar Glass, Blowing Bulbs, A Thistle Funnel, Cracking and Breaking Glass, Leading and Direction of Cracks Use of Glass Rod or Strips of Window Glass, Joining Rod, Feet and Supports Gripping Devices for use in Corrosive Solutions The Building up of Special Forms from Solid Glass 10

III. Internal Seals, Air Traps, Spray Arresters, Filter Pumps Sprays, Condensers; plain, double surface, and spherical Soxhlet Tubes and Fat Extraction Apparatus Vacuum Tubes, Electrode Work, Enclosed Thermometers, Alarm Thermometers ... Recording Thermometers, "Spinning" Glass 32

IV. Glass, its Composition and Characteristics Annealing Drilling, Grinding, and Shaping Glass by methods other than Fusion Stopcocks Marking Glass Calibration and Graduation of Apparatus Thermometers Exhaustion of Apparatus Joining Glass and Metal Silvering Glass 55

V. Extemporised Glass Blowing Apparatus The use of Oil or other Fuels Making Small Rods and Tubes from Glass Scraps The Examination of Manufactured Apparatus with a view to Discovering the Methods used in Manufacture Summary of Conditions necessary for Successful Glass Blowing 80

Index 105

PREFACE

To cover the whole field of glass blowing in a small handbook would be impossible. To attempt even a complete outline of the methods used in making commercial apparatus would involve more than could be undertaken without omitting the essential details of manipulation that a novice needs. I have, therefore, confined myself as far as possible to such work as will find practical application in the laboratory and will, I hope, prove of value to those whose interests lie therein.

The method of treatment and somewhat disjointed style of writing have been chosen solely with the view to economy of space without the undue sacrifice of clearness.

BERNARD D. BOLAS.

Handbook of Laboratory Glass Blowing

CHAPTER I

Introduction and Preliminary Remarks General Principles to be observed in Glass Working Choice of Apparatus Tools and Appliances Glass.

Glass blowing is neither very easy nor very difficult; there are operations so easy that the youngest laboratory boy should be able to repeat them successfully after once having been shown the way, there are operations so difficult that years are needed to train eye and hand and judgment to carry them out; but the greater number of scientific needs lie between these two extremes. Yet a surprisingly large number of scientific workers fail even to join a glass tube or make a T piece that will not crack spontaneously, and the fault is rather one of understanding than of lack of ability to carry out the necessary manipulation.

In following the scheme of instruction adopted in this handbook, it will be well for the student to pay particular attention to the reason given for each detail of the desirable procedure, and, as far as may be, to memorise it... Continue reading book >>




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