and expose, say anywhere from i to 30 seconds on a 

 bright day and 5 to 10 minutes on a dull day. More 

 time is required for interior exposure. Never point 

 the camera toward a light window in an interior. This 

 is liable to "fog" the film. 



For snap shots in bright exteriors or of moving ob- 

 jects, use the largest opening and the quickest shutter. 

 A snap exposure of an interior is impossible. 



In using a film camera, load it in a darkened place, 

 '. A'ays turn the film to the next one immediately 

 after the exposure. When a film is completed always 

 record the date and place and any other data on the 

 gum sticker, and instruct the developer to letter this 

 on each film. It is thus recorded on every print. 



Pointing-Up. It is well to examine all concrete sur- 

 faces after removing centering and before pointing up. 

 If you can't do this, put a man you can trust on this 

 work so that he will not, without advising you, cover 

 up any structural weakness. 



Precaution for Work of Other Trades. Concrete 

 once set is very hard. Its form is, except superficially, 

 unchangeable and to cut or fit concrete to any of the 

 other trades is very expensive and unsatisfactory. Any 

 attachments must be thought of beforehand and the 

 proper forms placed. 



A well accepted method of taking care of steam fit- 

 ting is to use a galvanized iron sleeve somewhat larger 

 than the pipe and longer than the thickness of the 

 concrete. Slit the ends and spread to allow for nailing. 

 Put these in horizontally through the beams on the 

 line of pipe and vertically through the floor at risers. 

 By all means get the steam fitter onto the work before 

 you pour concrete. 



Get the electrician onto the job and have him place 

 his outlet boxes, and run his conduits in the concrete 

 floor, orer the steel reinforcement. 



Record of Efficient Men. The advantage of keep- 

 ing a record of your best men and knowing where to 



