(30 Transactions of the American Institute. 



sicler results of these experiments as being some of the most, if not 

 the most, important of the fair. 



With many thanks to you and the managers of the fair, for fur- 

 nishing the diamond used in the experiments, 



Yours very truly, 



THOS. EGLESTOK 



In conformity with the recommendation of the judges, the board 

 of managers awarded to Benjamin Chew Tilghman, Esq., of Phila- 

 delphia, Pa., the great medal of honor, for his invention of the sand- 

 blast process. 



O. D. & E. C. WOODBURY'S MACHINE FOE MAKING- 

 BRUSHES. 



To the Board of Managers : 



Gentlemen. — After a full and impartial examination of the above 

 named machine, the undersigned judges make report that this emi- 

 nently novel, ingenious and useful invention embraces a new method 

 of making brushes, and a machine admirably adapted to the manufac- 

 ture of brushes according to that method. 



Prior to this invention, brushes were either made by hand or by 

 devices which assisted parts of the manufacture, but did not change the 

 method of construction of the hand made brushes. The bunches of 

 bristles were generally secured either by cement or by wires, which 

 passed through the bunch on the back of the block or stock, the holes 

 in the block being afterward covered by securing a covering to the 

 back of the block. 



This machine consists of an adjustable table having an overhang- 

 ing arm which sustains most of the working parts, which are driven 

 by steam or other power when in operation. The bristles are 

 arranged in a metallic comb, which passes on guides through the 

 machine. The bristles are arranged, are seized by teeth and forced 

 through a spiral passage-way and so turned that they rest against a 

 guide-way, and so turned that they rest against a guide; a point 

 divides a sufficient quantity to form one bunch of bristles ; below this 

 point is a wedge which moves the bunch to a position directly over 

 a tube and beneath a grooved and slotted plunger, which descends 

 upon the center of the bunch and forces it into the tube, doubling the 

 bristles so that they lie in the grooves of the plunger. At the lower 



