FREE BOOKS

Author's List




PREV.   NEXT  
|<   69   70   71   72   73   74   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93  
94   95   96   97   98   99   100   101   102   103   104   105   106   107   108   109   110   111   112   113   114   115   116   117   118   >>   >|  
r--that is, on the 30th June--the Board of Longitude met, when Harrison was present, and produced the chronometer with which he had made the voyage to Lisbon and back. The minute states: "Mr. John Harrison produced a new invented machine, in the nature of clockwork, whereby he proposes to keep time at sea with more exactness than by any other instrument or method hitherto contrived, in order to the discovery of the longitude at sea; and proposes to make another machine of smaller dimensions within the space of two years, whereby he will endeavour to correct some defects which he hath found in that already prepared, so as to render the same more perfect; which machine, when completed, he is desirous of having tried in one of His Majesty's ships that shall be bound to the West Indies; but at the same time represented that he should not be able, by reason of his necessitous circumstances, to go on and finish his said machine without assistance, and requested that he may be furnished with the sum of 500L., to put him in a capacity to perform the same, and to make a perfect experiment thereof." The result of the meeting was that 500L. was ordered to be paid to Harrison, one moiety as soon as convenient, and the other when he has produced a certificate from the captain of one of His Majesty's ships that he has put the machine on board into the captain's possession. Mr. George Graham, who was consulted, urged that the Commissioners should grant Harrison at least 1000L., but they only awarded him half the sum, and at first only a moiety of the amount voted. At the recommendation of Lord Monson, who was present, Harrison accepted the 250L. as a help towards the heavy expenses which he had already incurred, and was again about to incur, in perfecting the invention. He was instructed to make his new chronometer of less dimensions, as the one exhibited was cumbersome and heavy, and occupied too much space on board. He accordingly proceeded to make his second chronometer. It occupied a space of only about half the size of the first. He introduced several improvements. He lessened the number of the wheels, and thereby diminished friction. But the general arrangement remained the same. This second machine was finished in 1739. It was more simple in its arrangement, and less cumbrous in its dimensions. It answered even better than the first, and though it was not tried at sea its motions were sufficiently exact for finding
PREV.   NEXT  
|<   69   70   71   72   73   74   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93  
94   95   96   97   98   99   100   101   102   103   104   105   106   107   108   109   110   111   112   113   114   115   116   117   118   >>   >|  



Top keywords:
machine
 

Harrison

 

dimensions

 

chronometer

 

produced

 

captain

 

perfect

 
present
 

occupied

 
moiety

Majesty

 

proposes

 

arrangement

 

Graham

 

George

 
expenses
 

incurred

 
recommendation
 

awarded

 

consulted


Commissioners

 
amount
 

accepted

 

Monson

 

simple

 

cumbrous

 

answered

 
finished
 

general

 

remained


finding
 

sufficiently

 
motions
 

friction

 

cumbersome

 

exhibited

 

perfecting

 

invention

 

instructed

 

proceeded


possession

 

wheels

 

diminished

 
number
 
lessened
 

introduced

 
improvements
 

circumstances

 

discovery

 

longitude