- 1110 to 1116 Noble Street, Philadelphia, are well calcuJated to promote healthful and comfortable tinguishing feature is that the slide itself is of the same thickness as the rule, and has its two faces flush sleep, not only in hot summer weather, but through- with those of the rule. The rule and… … improvement simplifies con- siderably the working out of many complex calculations, slightest movement of the body, and it cannot become besides allowing of such computations as aXbXc=a, on the end next the powder box, and with its conical heated, as each movement of the body changes the n/a=a,…
Internet Archive · Public domain (published before 1931). Free to use for anything.
