575 



Liji of New Puhlications, 



[Jan, 1, 



fliips, to fliew hnw his own machinerj 

 a6(s upon it, 1111(1 aitlioiii;h one only is iii- 

 fcitcd, two or more miiy be worked or 

 jHit ill motion by tiie fame machinery. 

 We have alio delinrations of vertical and 

 horizontal wheels, which may be revcrlid 

 or tranfpofed as occalion requires, fo as 

 to accelerate the motion of the pump or 

 pumps which may be found neccli'ary on 

 board lari;c Ihips, or in other fituatioiis 

 where a larj^er power is defired. The 

 ratio of the diameter of the wheels here 

 given, are as four feet to two, but they 

 may be of equal or varied dimenlions. 

 There is a fliaft or fpindlc, wh(jfe length 

 or dimenliou inuil be taken accordint; to 

 the fituation of one v\heei fixed to work 

 the other at tlie top of the Ihaft. At the 

 top of the Hiaft is a fmall head, properly 

 mortifed to admit bars or levers, and to- 

 ivards the middle of the fliaft is a flay- 

 collar, fatlened to the floor or deck, to 

 keep the ihaft at a right angle with the 

 horizontal wheel. The levers or hanrl- 

 fpikes, are about fix feet long; but the 

 length and fize of thefe will depend upon 

 the lize of the [lump, and the iituation on 

 which the machinery may be atfixed. 

 Another part of the drawing reprefents a 

 ditTerent kind of pump-work to which 

 this machinery is applicable in raifint; 

 water, either on board Iliips, or upon land 

 from wells, pits, ponds, iSzc. or in any fitu- 

 ation where the raifing and throwing up 

 water may be required. The levers may 

 be put in motion by cattle or any other 

 adequate power. 



MR. ISAAC Bim's, (PLYMOrTH DOCK,)ybr 



a Black Paint, compnftd chiejii/ of 



earthi) and mineral Siihjianccs. 



This invention conlilts in uniting in 



proper quantities, calcareous or argilla- 

 ceous earth with lamp-black or ivory- 

 black, in the following manner. Take 

 of the blueifli marly (lone found in cop- 

 per, tin, and lead mines, and of iron- 

 flone, and of fine blue llate, and of under 

 earth equal quantities, and reduce thcni 

 by grinding or pounding to a very fine 

 povider. To any quantity of thefe mate- 

 rials add one-iii:htli of their weij;ht of 

 lamp-black, fo that there will then be 

 feven-eightliB of the earthy or mineral 

 fubfhmces, and one-eighth of the lamp- 

 black. This produces a fuperior black 

 paint for wood, iron, canvas, or any other 

 thing for which paint is ufed ; but, for 

 the purpofe of ufing fucli paint, it mult 

 be ground in the ufual way with oil, and 

 then when mixed with oil, and being 

 made up as other paint in general is, it 

 may be ufed with the brufli as in common 

 practice. The aforel'aid articles may alfo 

 be taken feparatcly, or two or three to- 

 gether, and prepared with lamp-black as 

 before defcribed. T"he invention is per- 

 formed alfo by ufing ivory-black inftead 

 of lamp-black, though the latter is mod 

 efteemcd by the patentee. The nnder- 

 earth he procures from the coal-works in 

 the Forell Dean : the blueifli marly-rtone 

 is produced in the mineing parts of De- 

 von, and Cornwall. This invention con- 

 hfts only in the uniting the above-men- 

 tioned articles with lamp-black or ivory- 

 black, and one-eighth is ftated becaulc, 

 that is the quantity generally ufed, and 

 which in all the trials made by IMr. Birt, 

 has never failed to produce the effect, 

 though he has fometinics ufed as much 

 as one-fifth, and on other occalions as 

 little as one lixteenth. 



LIST OF NEW PUBLICATIONS IN DECEMBER. 



5^ -As the Lifl or Nfrr Pnhlicrflions, cunlaincd in the Monlhli/ Mas^azine, is the 

 ONLY COMPLETE LIS r PUBLISHED, and confaiunth/^the onh, sne 

 that can be ujii'il to the Public for Parpojis of general licference, it is rei/nejled, 

 that Authttrs and Publijhers rrill continue to conmninicate Notices of their Work. 

 (Pojlpuid), and the 1/ u' ill alwum be faithfully injerted, FREE ofEXPENCE 



AGRICULTURE. 



AN Eflay on Woo), containing an Exaini- 

 iirttion iit'the prefeiit Grc*th of Wool, in 

 erery Diftrift throughout the Kiiigdnnij 

 and the Means pointed out for its Improve- 

 luetit; l>y John Luccock, Woolftapler. os. fid. 

 Remark.'; on tlie Hulhandry and Coni- 

 iiierce of Bengal ; by H. I, Colebrook, Efq, 

 8to. 53. 6d. bds. 



Communications to the Board of j\gricul- 

 ture, vol. 5, part 1. 12s. bds. 



Practical Agriculture ; or, a Complete 

 S3'ftem of Modern Hulhandry, with the beft 

 Methods of Planting, and the improved Ma- 

 nagement of Live Stock ; ilhifiraled by one 

 hundred Engravings, by W. Dickfon, M.D. 

 A new and much-improved edition, in ^ 

 large vols. 4to> 41, 4t. bds. 



Tables 



