108 ANNUAL OF SCIENTIFIC DISCOVERY. 



recently had prepared under their direction, boxes of colors, and sets 

 of mathematical instruments, which are sold at the following prices. 

 The box of colors retails for one shilling, and contains the following 

 colors gamboge, lake, light red, ultramarine, vermillion, indigo, 

 yellow ochre, Vandyke brown, sepia, burnt sienna, and three hair 

 pencils. The cases of instruments are of two kinds : 1 . Those 

 necessary for learning the elements of geometric construction ; viz., a 

 graduated boxwood ruler and set-square, a pair of six inch compasses, 

 with moveable pen and pencil legs in a slide box ; these are sold to 

 the public for half a crown. 2. Those necessary for affording artisans 

 and others who have some knowledge of drawing, the means of 

 putting their draAving into practice in their various trades, viz., a 

 pair of six inch compasses, with pen and pencil legs, a drawing pen, 

 a bow pencil, a bow pen, and a boxwood protractor : these are sold 

 for six shillings. 



INSTRUMENT FOR OBTAINING CORRECT REPRESENTATIONS 



FROM NATURE. 



AT the Belfast meeting of the British Association, Mr. H Twining 

 presented an ingenious instrument, designed to aid in obtaining cor- 

 rect representations of objects from nature. This little instrument 

 was on the principle of a theodolite ; by which the angular positions 

 of the several objects in a scene in nature, which the artist had 

 resolved to transfer to his canvas, could be accurately recorded in his 

 note-book, and afterwards, at leisure, by the aid of a square frame of 

 crossing threads, accurately placed in a picture of any determined 

 size, according to certain simple rules, which the author pointed out. 



CULINDRON PIANO. 



THE above is the name applied to a new form of the piano, invented 

 by Messrs. Speer & Marx, of N. J. The novelty of this instrument 

 consists in the form of the sounding board and the consequent 

 arrangement of the strings, &c. In order to obtain a larger surface 

 for sound than would otherwise be possible, the sound board is shaped 

 cylindrically, forming an upright pillar, Avith the strings keyed on the 

 exterior. There is, accordingly, a great difference in the arrange- 

 ment from that of the ordinary piano, as the strings, &c., are placed 

 in a vertical instead of a horizontal position. But the chief improve- 

 ment consists in the sounding board, which from its peculiar shape, 

 presents many advantages of tone as well as of larger surface. There 

 is a pedal attachment for piano and forte in the usual manner, which 

 is connected with the top of the cylinder. 



ON THE PRESERVATION OF FRUIT. 



AT a late meeting of the Farmers' Club of New York, Mr. "W. R. 

 Smith, of Wayne County, Pa., gave an explanation of a new method 



