Transactions . bs—though,for the peculiar exigencies encountered in conducting a mine- in i: i:\ ho \ OF MINB-Sl Rl BYING [N8TR1 MB NTS. >ui-\<\ with an interchangeable auxiliary, a single web fulfills<\vt\ demand and is not a serious inconvenience, unless thesurveyor insists upon doing the verj thing I am trying toavoid, namely, observing vertical angles with the auxiliary ntop, ami computing the correction for eccentricity. Mr. Lyman is entitled to grateful acknowledgment for thevery thorough investigation he has made in response to 111 * -last paragraph of my paper,4 which was
Transactions . bs—though,for the peculiar exigencies encountered in conducting a mine- in i: i:\ ho \ OF MINB-Sl Rl BYING [N8TR1 MB NTS. >ui-\<\ with an interchangeable auxiliary, a single web fulfills<\vt\ demand and is not a serious inconvenience, unless thesurveyor insists upon doing the verj thing I am trying toavoid, namely, observing vertical angles with the auxiliary ntop, ami computing the correction for eccentricity. Mr. Lyman is entitled to grateful acknowledgment for thevery thorough investigation he has made in response to 111 * -last paragraph of my paper,4 which was intended to cowmore plainly my own estimate of its worth than the presump-tuous title would imply. The time available for its preparationin the midst of a busy professional career was bo limited as topermit errors and misconceptions to creep in. Of course it isasabsurd to suppose that Ramsden had constructed his circulardividing engine at twenty-three, in the second year of his ap- Fig. 165. Fig.
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
