The following will indicate the character of the subject-matter:

Expense of Ventilation - Difference Between "Perfect" and Ordinary Ventilation - Relations of Carbonic Acid to the Subject - Methods of Testing Ventilation.

Heat, and some of the Laws which govern its Production and Communication - Movements of Heated Air - Movements of Air in Flues - Shapes and Sizes of Flues and Chimneys.

Amount of Air-supply Required - Cubic Space.

Methods of Heating: Stoves, Furnaces, Fire-places, Steam, and Hot-water.

Scheduling for Ventilation Plans - Position of Flues and Registers - Means of Removing Dust - Moisture, and Plans for Supplying It.

Patent Systems of Ventilation and Heating - The Ruttan System - Fire-places - Stoves.

Chimney-Caps - Ventilators - Cowls - Syphons - Forms of Inlets.

Ventilation of Halls of Audience - Fifth Avenue Presbyterian Church - The Houses of Parliament - The Hall of the House of Representatives.

Theatres - The Grand Opera-house at Vienna - The Opera-house at Frankfort-on-the-main - The Metropolitan Opera-house, New York - The Madison Square Theatre, New York - The Criterion Theatre, London - The Academy of Music, Baltimore.

Schools.

Ventilation of Hospitals - St. Peters-burgh Hospital - Hospitals for Contagious Diseases - The Barnes Hospital - The New York Hospital - The Johns Hopkins Hospital.

Forced Ventilation - Aspirating-shafts - Gas-jets - Steam Heat for Aspiration - Prof.trowbridge's Formulae - Application in the Library Building of Columbia College - Ventilating-fans - Mixing-valves.

The book is free from unnecessary technicalities and is not burdened with scientific formulae.

It is invaluable to Architects, Physicians, Builders, Plumbers, and those who contemplate building or remodeling their houses.

Sold By All Booksellers. Large 8vo. Handsomely Bound in Cloth. Price $3.00, Postage Paid.

Address, - Book Department, The Engineering And Building Record, No. 277 Petri Street, New York. Obtainable at London Office, 92 and 93 Fleet Street, for 15 Shillings.

The Sixth Volume Of The Sanitary Engineer - Includes the twenty-seven issues from June 1 to November 30, 1882. The following are a few of the many articles of permanent interest:

Illustrated descriptions of the plumbing work in the well-known residences of Messrs. William K. Vanderbilt, Cornelius Vanderbilt, Ex-gov. Samuel J. Tilden, John Sloane. Also of the "Mills Building" (the largest office building in New York), and Minot, Hooper & Co.'s Commercial Buildings. A Russian Bath Establishment in Boston and the St. James Hotel in Baltimore.

"Berlin Sewerage." An elaborate report of the system just completed, with illustrations. By M. A. Durand-claye, Engineer-in-chief of Bridges and Roads of Paris.

"Trap Syphonage." Report with illustration of experiments for National Board of Health. By Edw. S. Philbrick and E. W. Bowditch. Also by Col. Geo. E. Waring, Jr. Also in England by S. S. Hellyer, Esq. Interesting and valuable data.

"Coverings for Steam Pipes." Results of Some Experiments. By Mr. M. J. Bird.

Weekly " Mortality Returns " of the leading cities in the United States, with " Notes and Abstracts " from Reports of Health Officers and correspondents of the National Board of Health. These have been printed each week, beginning with issue of October 12.

"Tin in Canned Fruits." By Prof. Albert B. Prescott.

" Negro Mortality of Memphis." By Dr. G. B. Thornton.

"Pullman Sewerage." Abstract of paper describing it. By Benezette Williams, C. E., Engi-neer-in-charge.

"Letters to a Young Architect on Heating and Ventilation." By Dr. J. S. Billings, Surgeon, U. S. A.

A model plan for an " Improved Tenement for Working Men in New York."

" Burning of Town Refuse at Leeds." A paper by Chas. Slagg, Assistant C. E.

"The Relative Uses of Gas and Electricity." By C. William Siemens, F. R. S.

" The Management of Heating Apparatus." By Edw. S. Philbrick, C. E.

An extract from a paper by S. S. Hellyer on the "Unsealing of Traps by Momentum" - interesting in connection with experiments made by Messrs. Philbrick and Bowditch, and Col. George E. Waring, Jr.

"Water Waste Prevention." "Regulation of Exeter Water Works." A paper by Geo. I. Deacon, M. Inst. C. E., read before Society of Arts. "Report of Boston Committee," and report of results in Cincinnati.

"The Massachusetts Law to Prevent the Adulteration of Food and Drugs."

Practical articles on " Steam Fitting and Steam Heating." By "Thermus."

An illustrated article describing the " Accommodation for the Foreign Cattle Trade " at the Port of Liverpool. By Francis Vacher, M. D.

Plan of ' Flush Tank for Country Residences."

"Text of the Illuminating Oils Bill for New York State."

"The Effect of Water Level on Disease." By Baldwin Latham, M. Inst. C. E.

" A Form of Specification for Steam Fitting of an Eight-story Apartment House."

" Report on Oil Testers."

An article on the " Sewerage of Brighton, England." With reports by Sir Joseph Bazalgette and J. Bailey-denton.

A series of papers on " Water Analysis," from the A nalyst.

"Lead Poisoning." By Dr. Edw. S. Wood, Harvard Medical College.

In addition to the foregoing there are answers to a great variety of questions on the various topics treated by The Sanitary Engineer, the usual record of patents granted and the weekly reviews of questions of current interest to sanitarians, and of the condition of the Gas and Electric Light Industries. This latter feature makes the paper of real value to inventors, since the aim is to state the facts without bias for either interest.

Bound in cloth, $3. Postage, 40 cents.

The Engineering And Building Record, 277 Pearl Street, New York.

Obtainable at London Office, 92 and 93 Fleet Street, for 15s.

The Eighth Volume Of The Sanitary Engineer Comprises the twenty-six weekly issues from June 7 to November 29, 1883, and is replete with interesting information for every intelligent person.

Among the many important articles of permanent interest, the following may be mentioned: