369. The application of photography to construction work, and its value, can be no stronger exemplified than in the use which the Arnold Company - engineers and contractors - of Chicago, are making of it. Through the kindness of Mr. P. L. Battey, the Chief Engineer of the Railway Shops Department of this company, we are able to reproduce herewith two series of illustrations, which very clearly show the immense value of photography in this particular line of work. The prints are actual construction photographs, having been taken from the regular office records of the Arnold Company.

370. The series which we reproduce by no means comprise the complete set of views which this company had made of these subjects. We simply reproduce a sufficient number to show the application of photography to construction work.

371. The series shown in Illustrations No. 79 and No. 80 illustrate the construction of the Stratford, (Ontario) shops of the Grand Trunk Railway System, for which the Arnold Company are engineers and surveyors. The Locomotive Shop Building, illustrated, is on the site of the old shop, and due to the requirement of minimizing the interference of the regular work of the Railway Company, the building was put up in sections. These photographs show the first fifteen bents, of which there are twenty-seven.

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372. The series of views shown in Illustrations No. 81 and No. 82, (which have been lettered in alphabetical order) are construction photographs Nos. 4D, 24D, 48D, 56D, 68D, and 76D. These were all taken from one of the towers referred to in Paragraphs 341-343 of the preceding chapter, and will give an idea as to the progress of this particular part of the site. Of course these views only take in a portion of the work, and are not indicative of the progress of the remainder.

373. The area covered by the camera in these photographs is a number of acres, as the entire area of the plant covers about forty acres. Supplementary views of course were taken, showing particular methods and types of construction throughout the work, in addition to the four general views.

374. The towers referred to above and shown in the diagram (Illustration No. 77) are the ones employed in making this series of records. One of the towers is included in all of these photographs (with the exception of No. 4D), and will be observed in the extreme distance, a trifle to the left of the center.

375. Although it is not always possible to use this particular method of taking pictures on all work, it is the aim to do so as consistently as the conditions will permit. Where towers are used, the photographer simply sets up his camera at the regular time and makes the exposure without any special instruction from the superintendent or representative of the company at the time, the whole proposition being pre-determined.

376. In regular construction work the Arnold Company takes the pictures every two weeks, and the prints are bound in their regular graphical progress charts, covering each section of the work, a copy of which goes regularly to the client.

377. A number of the large railroad companies for whom the Arnold Company has handled construction work, and upon which they have used their regular system con-

Construction Work Practical Application 090089

Courtesy of the Arnold Co., Chicago

Illustration No. 79

Construction Photographs - A Series for Record Work

See Paragraph 371

Construction Work Practical Application 090090

Courtesy of the Arnold Co., Chlcago

Illustration No. 80

Construction Photographs - A Series for Record Work

See Paragraph 371

Construction Work Practical Application 090091

Courtesy of the Arnold Co., Chicago

Illustration No. 81

Construction Photographs - A Series for Record Work

See Paragraph 372

Construction Work Practical Application 090092

Courtesy of the Arnold Co., Chicago Illustration No. 82 Construction Photographs - A Series for Record Work See Paragraph 372 struction reports, which include the photographs, have adopted the same system, and are using it universally upon all of their construction work.