Sopmth's Treatise on Isometrical Dramoing. loi 



" 6. That, as soon as the land is opened for the manure, it be laid in; the 

 ridges formed, and the seed drilled immediately. The quicker these operations 

 follow each other, the better chance of the crop. 



" 7. That the manure chosen be such as will be adapted to the soil, and 

 insure the speediest growth of the young plant ; and that a full quantity be 

 allowed. 



" 8. That the seed be not deposited in the manure ; but the manure be 

 thinly covered with soil, and the seed drilled in this soil. 



" 9. That a very liberal allowance of seed be given ; as much as 3 lb. or 

 4 lb. an acre for drill, and 6 lb. or 7 lb. for broadcast ; and that this seed be of 

 one year's [not different years'] growth. 



" 10. That, as soon as the plant appears above ground, it be dusted with 

 quicklime ; and this be repeated as often as rain or wind beats it off, and the 

 fly reappears, 



" 11. That, in places which suit, and in seasons particulary dry, watering 

 by a watering-machine be resorted to. 



" Under these precautions, the committee confidently trust that the loss of 

 crop from the turnip fly may be, in most cases, prevented." 



For the detail of facts and opinions which have led the com- 

 mittee to these conclusions, recourse must be had to the work 

 itself. 



Sopwii/?, T., Author of Geological Sections of the Lead Mines 

 on Alston Moor and Teesdale, and of a Descriptive Account 

 with Architectural Details of All Saints' Church, in Newcastle 

 upon Tyne : A Treatise on Isometrical Drawing, as appli- 

 cable to Geological and Mining Plans, Picturesque Deline- 

 ations of Ornamental Grounds, Perspective Views, and 

 Working Plans of Buildings and Machinery, and to General 

 Purposes of Civil Engineering ; with Details of improved 

 Methods of preserving Plans and Records of Subterranean 

 Operations in Mining Districts. With 34 copperplate en- 

 gravings. 8vo. London, IBS*. 



So little is isometrical perspective, or rather isometrical pro- 

 jection (for perspective it is not), known to architects, that, when 

 the designs of farm buildings, in our Ena/clopadia of Architec- 

 ture^ first appeared, many London architects considered them as 

 intended to be drawn in that sort of bird's-eye perspective which 

 was formerly used in giving plans of the grounds of the nobility 

 and gentry. It may be seen in numerous French works ; for 

 instance, those of Le Rouge, and in the English work of Kipps. 

 Isometrical projection, we are informed by Mr. Webster, the 

 geologist, was taught in Aberdeen when he was a boy. We 

 believe, however, that it was first reduced to fixed principles by 

 Professor Parish of Cambridge ; and first applied in practice by 

 Mr. Joplin, the author of an excellent little work on the subject 

 {The Practice of Isornetrical Perspective, 8vo, 45.); and in Westall's 

 Designs for Farm Buildiyigs, published in 1827. 



In Mr. Joplin's works, this mode of drawing is chiefly applied 

 to architectural subjects ; but in Mr. Sopwith's it is extended, 



