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[Book Reviews]

Nature volume 113, page 672 (10 May 1924) | Download Citation



MESSRS. FAWDRY and DURELL have written a book eminently suitable for the class of pupil they have in mind. It contains a very good course, and has one advantage over some other books in that an attempt is made to deal with the exponential and logarithmic functions in a manner that the student might really understand. The emphasis laid on the practical convenience of the logarithms to base e is misleading; it is rather theoretical convenience that dictates the use of base e. Also, one cannot help wonder ing whether any pupil is ever impressed by such an example as finding the limit of (x2-4)/(x-2) as x-z: if so, he must be a particularly innocent pupil who takes a delight in thinking as he is told. Ex. 13 on p. 47 would perhaps amaze an architect, and there is a bad misprint on p. 168. Further, is it really essential to say that the value 2-30 for logeio leads to 0-435 for log12e? There is danger that the student may thus learn something that he will have to unlearn with much heart-burning later on. There is a bad misprint on p. 195. But these small faults do not detract from the value of the book, which we can heartily recommend.

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