This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...in No. i, Plate XVI I., if we suppose the Fraunhofer lines removed. If the pale blue flame of the Bunsen's burner be similarly examined, the spectrum, No. 14, Plate XVI I., shows that only a few rays of certain refrangibilities are emitted, forming bright lines here and there, but of little intensity, while ...
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...in No. i, Plate XVI I., if we suppose the Fraunhofer lines removed. If the pale blue flame of the Bunsen's burner be similarly examined, the spectrum, No. 14, Plate XVI I., shows that only a few rays of certain refrangibilities are emitted, forming bright lines here and there, but of little intensity, while the whole of the other rays are absent. This shows that while the highly heated solid gives off all rays from red to violet without interruption, the still more highly heated gases give off only a few selected rays. It has long been known that some substances impart certain colours to flan.es, and such substances have been long employed to produce coloured effects in fireworks, &c. But coloured flames do not appear to have been examined by the prism until 1822, when Sir John Herschel described the spectra of strontium, copper, and of some other substances, remarking that "The colours thus communicated by the different bases to flame afford in many cases a ready and neat way of detecting extremely minute quantities of them." A few years later, Fox TaIbot described the method of obtaining a monochromatic flame, by using in a spirit-lamp diluted alcohol in which a little salt has been dissolved. The paper in which he describes this and other observations concludes thus: "If this opinion should be correct and applicable to the other definite rays, a glance at the prismatic spectrum of flame may show it to contain substances which it would otherwise require a laborious chemical analysis to detect." Here we have the first hint of that spectrum analysis which has provided the chemist with a method of surpassing delicacy for the detection of metallic elements. The spectra of coloured flames were also subsequently examined and...
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Good. No dust jacket. 1901. 820 pages. No dust jacket. Pictorial plate to blue cloth boards with gilt lettering to spine. Black and white illustrative plates. Slightly loose binding to clean, lightly tanned pages and plates with bright copy throughout. Cracked hinges at paste downs exposing binding and creating shaky boards. Previous owner's name and cut out stuck to fep. Minor foxing to endpapers and infrequent page edges. Light rub wear and markings to boards with tanning to spine and board edges. Minor stains with small tear to plate at front. Slight forward lean. Moderate rub wear to edges with fraying to spine ends and bumped corners exposing boards beneath. Small tears to spine ends exposing binding. World of Rare Books Item ref. 1502702258IMO (Use this ID when enquiring about this item. )
The dust jacket is missing, the boards are worn with bumping to the spine ends and corners. The pages are secure to the binding, the edges are gilt all round. There are previous owner details inside the covers. This book is from our pre ISBN stock and is therefore over 50 years old. It will have a general appearance commensurate with its age including age effects to page edges, binding and boards. Dust jacket is absent unless otherwise stated Usual signs of a well read book but good overall c.
Very Good. No Jacket. 8vo-over 7¾"-9¾" tall This is a Very Good Copy of this book in publisher's poriginal red pictorial cloth with design of a brunel bridge to the upper cover of the book and title lettering is in gilt to both spine and u[pper cover. Cloth rippled a little to upper cover. All page edges are in gilt. This copy has one previous inscription to the blank ffep and there is one small stamp to bottom edge of the title page. The book has a firm binding with no hinge weakness and there is no leaning to spine. Illustrated throughout in black and white with key inventions and early engineering works and discoveries.8vo 681pp Eighth Edition.
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