Textbook of Fire Assaying

E. Bugbee Edward

Description

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. This book is the outgrowth of a set of mimeograph notes pre pared in 1911 and intended for use in the course in fire assaying at the Massachusetts Institute of Technology. The mimeograph notes were succeeded by a book of 150 pages published by the author in 1915. The present volume has been revised and en larged and is offered as a small contribution toward the scientific explanation of the ancient art of fire assaying. It contains some hitherto unpublished results of research, as well as considerable new data derived from a careful search of all the available litera ture, none of which have previously appeared in book form. Although intended primarily as a college textbook, it is not en tirely elementary in character and it is hoped that it will be found sufficiently complete and fundamental to be of service to the more mature student of the science. Every effort has been made to avoid the old cook-book method of presentation so common in books of this kind and to give the underlying scientific reasons for the many phenomena which occur, as well as the rationale of each process and detail of manipulation.

Sujets

• Sciences et techniques
• Chemistry

Informations

• Publié par: Forgotten Books
• Date de parution: 27 novembre 2019
• Nombre de lectures: 0
• EAN13: 9780243785377
• Langue: English
• Poids de l'ouvrage: 9 Mo

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Th s is the outgrowth of a of mimeograph notes pre pared i n and intended for in the course infire assaying at the M assachusetts Institute of Technology The mimeograph notes were suc ceeded by a book of pages published by the author in The present volume has been revised and and is o fered as a small contribution toward the s cientific explanation of the an cient art offire assa ing I t contains some h t erto unpublished esults of research as well as consi derable new data derived from a careful search of all th e available litera ture none of which have previously appeared in book form lthou g h intended primari i t ly as a college textbook is not tirely elementary character and it is hoped that it will be fo u nd su ciently complete and fundamental to b e of service to the more mature student of the scienc e very e fort has been made to avoid the old cook book method of presentation common in books of this kind and to give the underl ng scientific reasons for the many phenomena which occur as well as the rationale of each process and detail of manipulation The obj ect of i nstruction infire assaying should not be merely the train ng of students to obtain results of a certain degree of precision by blindly follo wing some procedure as is too often the case the contrary their attention should be focussed on the physical and chemical principles which govern the various operations If they tru y understand the reasons for the use of each of the reagents and for the various details of technique they will not have to hunt over the pages of a receipt book when c nfronted by an ore of unfamili r constitution but will be able to make up their o wn assay charges and outlin e thei r details of manip lation The author believes that a course infire assaying is the logi cal place to i ntroduce the study metallurgy The study of gen eral metallur g y which is abstract and unintere s tin g by itself is made concrete and intensely interestin g if the various processes of are used to illustrate its principles M ost of the

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principles of metall u r g y are utilized in one sta g e or another of the fif taught in this connection re assay and i nterestthe student s awakened the principles are understood and the st u dy of this branch of metallur g Withy becomes a pleasure and not a burden this end in view emphasis has been laid on those metallurgical principles which are of importance infifor examplere assaying the thermochemistry of the metals and of their oxide and sul compounds the nature and physical constants of sla g s the characteristics of refrac tories and fuels th e principles of ore sampling the behavior of metalli c alloys on coolin g and the chem ical reactions of oxi dation and reduction In the short time allowed for instruction infin there assaying i c rowded curricula of our technical schools the time factor is an important consideration With lar g e classes and a limited num ber of laboratory instructors the author s experienc e leads him to the conclusion that it is inadvisable to rely too much o n verbal instruction in the classroom and laboratory particularly during thefihas torst few weeks when so much that is entirely be mastered before any real progress can be made xplicit tions are given therefore for thefithus savinrst analyses g the student s time and conservin g his e forts by making i t possible for him to attack the subj ect intelli g ently and without any sary delay the work pro g s laid upon destress i resses less tailed procedure and the student is placed more upon his own sources and encouraged to work out his own assay char g es from his knowledge of fundamental principles aided by a study of typical examples The order of arrangement of laboratory work is the lo g i cal one beginning with cupellationfin therst in the qualitative and then i quantitative way The assay of lead bullion leads naturally to parting for the determination of the gold after whi ch either scori or crucible assaying may be undertaken When available the source of what may be termed new formation has been acknowledged but this has not always been possible and the author trusts he may be pardoned for any serious omissions i n this particular lthough it is hoped that in the present book all of the errors which oc curred i n the auth o edir s tion have been eliminated some new ones may have crept in and the author will esteem it a favor to have these called to his atten ion would al o be pleas r any suggesti ec ve ns

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c ti cisms which m ght be embodied in a subse uent edi tion s uc h should be required T o the many friends who have supplied material or helped other ays the writer wishes to express gratitude The of the naconda opper M and of th e nitedining ompany tates meltin g Refidning an M inin g ompany have been helpfu in this way The author is partic u larly indebted to M r Rufus Reed for many helpful sug g estions and for read in g He wishes also to express his appre ciation ofthe type script the courtesy of the llis halmers M fg the orporaB raun tion the D enver Fire lay the Thompson Balance and the nited tates B u rea u of M ines for f u rnishing photographs and electrot y pes

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