Materials And Apparatus - Varieties And Defects Of Glass - Devitrification - Annealing Glass - Blowpipe And Bellows - Light - Arrangement Of Exercises - General Operations - Cutting - Bending - Constricting And Flanging Tubing - Methods Of Rotation And Blowing - Elementary Exercises - Joining Two Pieces Of Tubing Of The Same Diameters - Blowing Bulbs - Advanced Exercises - Sealing A Tube Through Another Tube: The Gas Washing Tube - Suction Pump - And Kjeldahl Trap - Modified Methods And Special Operations - Capillary Tubing - Glass Rod - Mending Stopcocks - Closed Circuits Of Tubing - Spirals - Ground Joints - Sealing In Platinum Wire - Sealing Vacuum Tubes - Closed Tubes For Heating Under Pressure - And Sixty Recipes For Flint Glass Making, With Index

This scarce antiquarian book is a selection from Kessinger Publishing's Legacy Reprint Series. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment to protecting, preserving, and promoting the world's literature. Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone!

This scarce antiquarian book is a selection from Kessinger Publishing's Legacy Reprint Series. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment to protecting, preserving, and promoting the world's literature. Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone

This scarce antiquarian book is a selection from Kessinger Publishing's Legacy Reprint Series. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment to protecting, preserving, and promoting the world's literature. Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone!

The purpose of this little book is to provide a clear and 1 detailed discussion of the elements of glass-blowing. I Many laboratories in this country, especially in the west, I are locatecl a long way frorn any professional glass-blower, 1 and the time and money spent in shipping broken apparatus several hundred miles to be mended could often be saved if some of the laboratory force could seal on a new stop-cock, replace a broken tube, or make some temporary repairs. Many men in physical or chemical I laboratories ha, ve occasiorr to modify some piece of apparatxs designed perhaps for other uses, or to design new apparatus. To such also, the ability to perform some of the operations herein described may be very valuable. No originality is claimed for the methods here tlescribed. They are those which the author has founct most suitable and convenieilt in his own work, and most easily learned by students. The aim has been to describe each operation in such detail that a beginner can follow the process without help and, with practice, attain satisfactory results. It is, however, much easier to perform any of the operations described, after seeing some one else perform it correctly since the temperature, the exact time to begin blowing theglass, and many other little details are very difficult to obtain from a description. It has not been thought worth while to describe the process of making stop-cocks, thermometers, vacuum tubes, etc., as such things can be purchased more cheaply and of much better quality than any amateur can make unless he is willing to spend a very large amount of time . in practice. For similar reasons the manipulation of quartz glass has been omitted. Lhc author will l.grateful for l11 suggest ioilh ill 1 r1.i t - to tllc. clspcrichllcc.tl worlicr arcL tot so to t lihgilio.. tlltt it is tlrc littlc tltbtails in t11cl ilililtio -d1it41 oftc slx.11 slccos. or fillll.c ill glis, -lloilg. I.TIIII.I.s ISL I l . . . . i . . . . . . . . . . 1 lTirict ios l11 1 defcclts of g11ss--Devitl.ificntion-1l1el- irlg l 5s -13lon-pil1e I nil llovs-Ligh t--hr1ngcneri t f cs-is. . . . . . . . . . . . . . . . . . kit t ilg, iclilg, olstritirlg 111l flangilg the tuhirlg- lot llotis of rotit ion and blovirig. CI 4 lSst., II.I., ISS I4,1lrx. . . . . . . . . . . . . . . . ., Toir irg t n-o licics of t ubilig of the salne ditnleter-The t tie t ulc -Joirlillg t s70 t 1 of s lifferent diameters- 1310vb7i11g luls. 1ty TSI.II-ISIS 16 .lr-.scru Ilsricrss . . . . . . . . . . . . . . . . . 35 Sililg I tube t llrough allot llcr t tibe The gas-washing tll, s.ictiorl pulnp, and IZjeldnhl trap. Sforrr.xr., r SII.TIIOL AXD SPECLAL OIIKXTIOSS . . . . . . 31 Cnpilliry t rlhing-Glass rod--3Iending stopcocks- Closcil circuits of tubing-Slirnls-Ground joints- Sciling in litinuln wire--Sealing tubes for het t ing under pressure. vacuum tubes-Closecl One of the most important factors in the success of any piece of glass-bloving is the glass employed. As is well known, there are two general varieties of glass Lead glass and soda glass. Formerly much apparatus was made of lead glass, but at present it is very seldom met with, except in the little drops of special glass used to seal platinum wires into the larger sizes of tubes. Lead glass is softer and more readily fusible than soda glass, but has the disagreeable property of growing black in a few seconds unless worked in a strong oxidizing flame.This may be prevented by using a hissing flame, with a large excess of air, and working in the extreme end of the flame or the black lead formed may thus be reoxidized, and the glass restored to its original clearness...