Kleinlein, Walter John, 1876- [from old catalog] · [Boston, Hooper printing co.] · leaf 27
-side for checking upthe temperaturewhen the door isopened. The bottom of thetanks hould be slight-ly higher on one sidethan on the other,with a one-half inchdrain pipe fitted tothe low side. Theinlet end of the pipeshould be coveredwith a fine screen toprevent dirt fromaccumulating in the pipe and… … (12) CHAPTER III DIFFERENCE IN OBSERVATORY ANDCOMMERCIAL SYSTEMS 10. Observatory System. IN THE foreign observatories where watchesare generally tested for competition prize, orcertificate purposes, they are subjected toeither three or five day tests in each temperature,preceded by one intermediate…
Clocks and watches
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