SCIENCE. 



[Vol. XV. No. 372 



■the other hand, tend to equalize the temperature even to a 

 •depth of forty fathoms. 



That the temperature of the water of the main channel of the 

 St. Lawrence is always considerably lower than that of the waters 

 nearer shore, or of the harbors or the affluent sti'eams. 



That no general rule can be laid down regarding the changes 

 of temperature with the increase of depth, each case being influ- 

 enced by its own special circumstances. 



That in high summer temperatures the surface of comparatively 

 still, shallow, sheltered water, unaffected by main channel cur- 



attached to the under side of the board have racks engaging 

 with wheels on the ends of the horizontal shaft, shown at the 

 bottom of the sliding frame. A spiral spring is wound around 

 this shaft for the purpose of balancing the weight of the parts 

 to be raised, and insuring the board against falling if left at 

 any elevation without clamping. The board is raised or low- 

 ered by means of the lever attached to the sliding frame which 

 works on a fulcrum fastened to the stand. The clamping 

 arrangement consists of a bent tube, its ends bearing against the 

 inner sides of the sliding pieces. A bolt is passed through 



Tents, absorbs and retains heat to a inuch greater degree than the 

 immediately overlying air ; the difference depending on the sur- 

 Toundings, but being in one instance as high as 11°. 



A. T. Deummond. 

 Montreal, Can., Marcli 13. 



INDUSTRIAL NOTES. 



A Nevy Drawing-Table. 



The principal features of the improved drawing-table shown 



-in the illustration are that the drawing-board may be raised or 



lowered with one motion of the hand, and that the board can 



-be tilted to any desirable angle. The vertical sliding pieces 



this tube, and, in clamping, it tends to straighten the tube, 

 thereby forcing the ends of the tube against the inner faces of 

 the sliding pieces, and holding these pieces firmly at any height. 

 The advantage of this clamping device is that it does not tend 

 to draw the stands together. The arrangement for tilting is 

 easily seen, and the device for clamping is the same as the one 

 just described. 



The stand is very light, and at the same time extremely rigid 

 and firm, and, with the clamping-screws tightened, there is no 

 liability to slip, even if the draughtsman rests his entire weight 

 on the edge of the board. These drawing-tables are manu- 

 factured by Messrs. Jones & Mack of Cincinnati, O. 



GOTT'S 



Of Pure Cod 



Liver Oil and 



HYPOPHOSPHiTIS 



of Lime and 



Is endorsed and prescribed by leading 



lihysiclans because botli tlje Cod Liptv Oil I 



ami Mtfpoxyhosphitcs are the recoguiz 



I agents in itie cure o£ CoiismiiiJtion. It is I 



I as palatable as milk. i 



Sgott's E§iyli!®ii %,z,F,:>Tit 



is a imniJciful Flesh VraiUlcn: li is the 

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 Scrofula, Broachitis, Wasting' I5:s- 

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 Ask for Scott's Emulsion and take no other. 



A New Method of Treating Disease. 



HOSPITAL REMEDIES. 



What are they ? There is a new departure in 

 the treatment of disease. It consists in the 

 collection of the specifics used by noted special- 

 ists ofEurope and America, and bringing them 

 within the reach of all. For instance, the treat- 

 ment pursued by special physicians who treat 

 indigestion, stomach and liver troubles only, 

 was obtained and prepared. The treatment of 

 other physicians celebrated for curing catarrh 

 was procured, and so on till these incomparable 

 cures now include disease of the lungs, kidneys, 

 female weakness, rheumatism and nervous de- 

 bility. 



This new method of "one remedy for one 

 disease " must appeal to the common sense of 

 all sufferers, many of whom have experienced 

 the ill effects, and thoroughly realize the ab- 

 surdity of the claims of Patent Medicines which 

 are guaranteed to cure every ill out of a single 

 bottle, and the use of which, as statistics prove, 

 /las ruined more stomachs than alcohol. A cir- 

 cular describing these new remedies is sent free 

 on receipt of stamp to pay postage by Hospital 

 Remedy Company, Toronto, Canada, sole pro- 

 prietors. 



DO YOU INTEND TO BUILD? 



We offer an Atlas of Sensible Low Cost 

 Mouses, a portfolio 11x14 inches, containing 

 liandsome illustrations, floor plans, and full 

 descriptions of this popular design, and flfty-four 

 others, ranging in cost from $800 to $7,200. This 

 specimen design Is for a cottage with seven rooms, 

 and costing $1,100. It combines beauty and comfort, 

 has two large porches, and is a popular and practi- 

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 for Its estimated cost. 



No matter what style of a house you may intend to 

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We will send this Atlas, postpaid, on receipt of 

 price, $1.~N. D. C. Hodges, A" Lafayette Place, New 

 York. 



\ opportunity. Geo. A. Seott, 843 Broadway, N. Y, 



Readers of Science 



Corresponding with or visiting Advertisers^ 

 will confer a great favor by mentioning this paper. 



