20 



Receipts for cleaning Marble, Uc. 



[Aug. 1, 



fcrew. Nor was he ignorant of the ele- 

 ments of phyfic, altronoiiiy, nialhemutics, 

 and navigation, and in theolo|i;ical and 

 philofophical fuhjcCts in general he flood 

 high in repute. But his chief delight was 

 poetry ; and to his fnenris it is well known 

 that he has fometimes conipoled a poem 

 with as much facility as a merchant 

 would write a letter on the ordinary con- 

 cerns of bufinefs ; fo that many of his 

 productions may be conlidered as mere 

 extempore effufions. Yet with thefe un- 

 common abilities he was modeft and dif- 

 fident ; and far better would it have been 

 forhimftlfand his family had he duly ap- 

 preciated his own merit, been lefs prodi- 

 gal and abilrafted in his ideas, and made 

 men and manners more his lludy. 



To the Editor of the Monthly Magazine. 



SIR, 



SEEING tl»e queries propofed in your 

 Magazine, (vol. 21, p. 522,) and ha- 

 ving a receipt for one of them in my pof- 

 feffion, namely, the cleaning af marble, I 

 am induced to lend it to you for infertion, 

 provided none of your numei'ous Corrc- 

 fpondents fiu-nilh you with a better,which 

 I lliall be glad to fee, as well as receipts 

 to the rell of Mr. Pybus's queries ; and 

 as he is poflftired of lb many curious re- 

 ceipts, he will afford great pleafure to 

 many of your readers by commuuicating 

 them. 



Herri pt for cleaning Murhle. 

 Take a bidloek'sgall, a gill offoap-lees, 

 lialf a gill of turpentine, and make it into 

 a paile with pipe-clay ; then apply it to 

 the marble, and let it dry a day or two ; 

 then rub it olV; and if not clean, apply it 

 a fecond or third time, until it is clean. 



I take the liberty of adverting to Mr. 

 J. Barlow's communication ref[iccfing 

 the capacity of certain colours for ab- 

 forbing the lieat of the rays of the fun. 

 lie prefumes it might be benelicial to 

 paint the infides of forcing-frames |)er- 

 lecily black. Now if black has the pro- 

 perty of abforbing the caloric of the fun's 

 rays, and white of retleiting them, it fol- 

 lows, that on the inlide of the frame be- 

 ing painted black, the frame and not the 

 plant.^ would receive more heat from this 

 arrangement ; but if the outhde was 

 black and the infide white, then tlse out- 

 fide, by abforbing the heat which fell up- 

 on it, would conduct it inward, and the 

 inlide being white, would reflect the heat 

 which fell upon it towards the plants : — 

 therefore from this method of applying 

 the colours the plants would be likely to 

 receive the greateit quantity of heat 



from the .Sun. Tiie fame will not hoW 

 good with refpect to fruit-walls, which I 

 Ihould ijrel'er being painted black, as the 

 heat rcrtected from a v^all is loft in the 

 atmofphere, but iieated air is confined irt 

 a forcing-fi-ame. 



1 am. Sir, &c., T. M. 



Jitli/ 7, 1806. 



To the Editor of' the Monthly Magazine. 



SIK, 



IN anfwer to the inquiries of Mr. Py- 

 bus, of Hull, in your lalt, I rcquelt 

 the favour of your inferting the follow- 

 ing. 



To make permanent Ink. 



Take any quantity of nitrate of fdver, 

 (ufually called cau/iic,) fuppofe a drachm, 

 and dilVolve it in a glafs mortar with 

 double its weight of pure water : this is 

 (he ink. In another glafs velfel dilfolve 

 a drachm of fait of tartar in an omice 

 and a half of water : this is ufually 

 named the lii]uid poinue, with which the 

 linen is faturated previoully to the appli- 

 cation of the ink. 



To clean Marble. 



To effect this I have frequently found 

 muriatic acid, either diluted or pure, as 

 occalion may require, prove eliicacious. 

 It will Ibmctunes deprive the marble of 

 its polilh, which may eafdy be reltored by 

 the ufe of a piece of felt, with fomc 

 powder of putty or Tripoh, with either 

 making ul'e of water. 



The colours for magic-lantern Ilider& 

 are I believe ufually ground in fpirit of 

 turpentine, and, when ufed, mixed with 

 turpentine-varnilh. To make the Phan- 

 taliuagorian figure, flic fpace round the 

 figure is painted with an opaque black. 



Richard .Smith. 

 Cherf/ey, Surrey, July 2, 1806. 



For the Monthly Magazine. 

 jOTT.NAi, of a voYACE performed in tlte 



I.VDIAN SEAS, to MADRAS, BENGAL, 



CHINA, SfC, 6ir., in his majesty's 



SHIP CAEOLINE, t«<Ae YEARS 1803-4-5, 



iiiterfpe7j'ed with Jhort descriptive 



SKETCHES of the PRESENT STATE of the 



principal settlements of the ikdia 



COMPANY". 



Communicated to the monthly magazine 

 by an oiiicer of the Caroline. 



ON the 24tli of May, 1803, a King's • 

 mell'enger came on board lus Ma- 

 jeliy's iliip Caroline, then lying in Cork 

 harbour, bearing the Declaration of War 

 againil France, and fealed orders, to be 

 opened in a certain latitude. 

 We immediately got under weigh ; and 



