A course in mechanical drawing for evening schools and self-instruction (1896)
Rouillion, Louis · Boston, New York, The Prang educational company · leaf 69
5o COURSE IN MECHANICAL DRAWING. SHEET XXIV. Globe Valve. The valve is symmetrical about its centre-line, ex- tlie valve seat is to break away a piece of the wall cepting the construction of the valve seat. One-half and show the entire valve seat in section. To avoid is in section and the left-hand… … v^_ NOTES ON WORKING DRAWINGS. GENERAL DIRECTIONS. Practice in the various draughting roomsmay differ in details, yet is uniform in principies. These principles we have been study-ing in the previous sheets of this course, andare about to apply them in making a completeset of working drawings of a…
Mechanical drawing
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