. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1846. J THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 289. equal to 3° 39' 37''';—Page 20. " Let it be required to describe a figure abcde, similar to A B C D E, whose area will be ^ of ;— Page 21. " Let it be required to construct a parallelogram whose area shall be equal to that of a given ; Page 2G " Describe a circle whose circumference will be llj ;—Page 27. " Given the diameter of a globe, to find the side of a c
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1846. J THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 289. equal to 3° 39' 37''';—Page 20. " Let it be required to describe a figure abcde, similar to A B C D E, whose area will be ^ of ;— Page 21. " Let it be required to construct a parallelogram whose area shall be equal to that of a given ; Page 2G " Describe a circle whose circumference will be llj ;—Page 27. " Given the diameter of a globe, to find the side of a cube whose solid- ity will be equal to that of the ;—Page 28. , ^ . , " In a certain construction the square root of 33 equal parts is required with great accuracy ; at what point must the centre be set to eliect this object?"—Page 28. Mr. Byrne has not spared his labours. The tables which he has given for the purpose of graduating the instrument are very extensive and carried to a greater number of places of decimals than would be generally re- quired in practice. The enplanations are so ample and precise that, with this book before him, the draughtsman can never be at a loss respecting the various problems which he is constantly called upon to solve by prac- tical construction. It has been remarked truly that, while the theodolite, SEXtant, and other instruments of surveying, have been brought to extra- ordinary perfection by the refinements of modern ingenuity and workman- ship, the constructions obtained from these exact instruments are reduced in a very rude manner. While almost everthing that could be done for attaining accuracy in the original trigonometrical operations has been effected, the means by which they are rendered practically available have been comparatively disregarded until the iuveution of the simple instru- Hient which we have been describing. Proposal for a general Metropolitan Railway. By J. C. H. Ogier, Esq., Barrister-at
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