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Mathematical Drawing and Measuring Instruments. Their Construction, Uses, 

 Qualities, Selection, Preservation, and Suggestions for Improvements; with 

 Hints upon Drawing, Colouring, Calculating Sun Printing, Lettering, etc. 

 By William Ford Stanley. Seventh edition. Cloth; 247 illustrations in the 

 text. Pp. vii+370. Price, 5s. London: E. & F. N. Spon. 1900. 



On the subject of impartiality, this book is open to criticism. For 

 instance, an entire chapter is given up to various improvements and 

 modifications of the pantagraph manufactured by the author, while the 

 suspended pantagraph, which is an improved form very commonly used 

 in America, is not even mentioned. Thus also, the ordinary triangular 

 scale receives a brief mention to the effect that it is not much used 

 and not much recommended. The patented triangular scale, in which 

 the graduations are raised from the drawing surface, is not mentioned, 

 although it has been one of the most commonly used drafting instruments 

 in America for more than ten } r ears. While the book may properly be 

 described as a desirable reference book for the draftsman, we would by 

 no means classify it as an essential. The majority of the instruments 

 described are those with which every draftsman is, or at least should be, 

 perfectly familiar, while the others such as oographs, cymagraphs, and 

 odontographs, the descriptions of which occupy a good portion of the 

 book, are instruments which probably not one draftsman in fifty will 

 ever see or ever possess. While these, which may be called special instru- 

 ments, have their peculiar uses, the work of most of them can usually 

 be performed, perhaps less conveniently, by other simpler and more 

 generally useful appliances. In large establishments such instruments 

 may occasionally be the most economical and desirable, and the drafts- 

 man should, therefore, at least be aware of their existence. This 

 purpose the book serves admirably, not only describing them in consider- 

 able detail* but also telling the particular work for which each is best 

 adapted. 



M. G. 



