|g05 MACHINE FOR TAKING t,ARGE STONES 6UT OF THE OaoUNB. 



the usual way of blasting-, and afterward using large 

 levers, &c. 



Where stones from two to four tons each are to be 

 taken up, two men will raise as many as twenty men in the 

 usual way. The work is done by the power of a tackle, but 

 by my method of fixing the tackle to the top of the stone, 

 by the plug which I have invented, it will hold till the stone 

 is pulled out of the ground, and laid upon the surface, or 

 upon a carriage, if required, all which can be done in a very 

 little time. 



Stones of four tons weight, or upwards, may be taken out 

 of the ground within the time of five or ten minutes, by two 

 men, without any earth or soil bemg previously taken from 

 < around them,, or without any digging witl) hacks or spades. 



J. C. Curwen, Esq., of Workington, has seen and approved 

 of my performance with this invention, and if the Society 

 should thrnk it deserving of a premium, it would ever be 

 gratefully acknowledged by 

 Gentlemen, 



Your most obedient humble serrant, 



ROBERT RICHARDSON. 



Keswick, Feb. 8, 1808. 



Dear Sir, 



Kfficacy of this I Cannot suffer Mr. Richardson*s letter to be sent to the 

 method. Society, without adding a few lines concerning it. I caa 



bear ample testimony to the ease, with which the largest 

 self-stones are lifted by this method. I have seen one up- 

 wards of five tons lifted by four men. One of the plugs is 

 sent for the inspection of the Society. There is no diffi- 

 culty in cutting the hole to receive it, the only care is not 

 to make it too large. It is difficult to explain tiie theory of 

 its action ; the least stroke laterally disengages the stone, 

 lu uses. In many situations it is likely to be of great use, not only iu 



drawing stones out of the ground, but in making weirs and 

 embankments, where the stones are only to be lifted a mo- 

 derate height. 



One of my farmers in Westmoreland has made great use 

 of one, and speaks of it in high terms. I have exhibited it 

 to numbers of persons, who could not believe its power, till 

 they su'.v it tried, 



Mr. 



