FREE BOOKS

Author's List




PREV.   NEXT  
|<   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   119   120   >>   >|  
novelty of my invention, but by the results which I promised, namely, of being able to deposit with a smooth surface 30 dwt. of silver upon a dish-cover, the crystalline structure of the deposit having theretofore been a source of difficulty. In this I succeeded, and I was able to return to my native country and my mechanical engineering a comparative Croesus. 'But it was not for long, as in the following year (1844) I again landed in the Thames with another invention, worked out also with my brother, namely, the chronometric governor, which, though less successful, commercially speaking, than the first, obtained for me the advantage of bringing me into contact with the engineering world, and of fixing me permanently in this country. This invention was in course of time applied by Sir George Airy, the then Astronomer-Royal, for regulating the motion of his great transit and touch-recording instrument at the Royal Observatory, where it still continues to be employed. 'Another early subject of mine, the anastatic printing process, found favour with Faraday, "the great and the good," who made it the subject of a Friday evening lecture at the Royal Institution. These two circumstances, combined, obtained for me an entry into scientific circles, and helped to sustain me in difficulty, until, by dint of a certain determination to win, I was able to advance step by step up to this place of honour, situated within a gunshot of the scene of my earliest success in life, but separated from it by the time of a generation. But notwithstanding the lapse of time, my heart still beats quick each time I come back to the scene of this, the determining incident of my life.' The 'anastatic' process, described by Faraday in 1845, and partly due to Werner Siemens, was a method of reproducing printed matter by transferring the print from paper to plates of zinc. Caustic baryta was applied to the printed sheet to convert the resinous ingredients of the ink into an insoluble soap, the stearine being precipitated with sulphuric acid. The letters were then transferred to the zinc by pressure, so as to be printed from. The process, though ingenious and of much interest at the time, has long ago been superseded by photographic methods. Even at this time Siemens had several irons in the fire. Besides the printing process and the chronometric governor, which operated by the differential movement between the engine and a chronometer, he was o
PREV.   NEXT  
|<   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   119   120   >>   >|  



Top keywords:

process

 
printed
 

invention

 
obtained
 

Siemens

 

governor

 
chronometric
 

applied

 

printing

 

Faraday


anastatic

 
subject
 

deposit

 

country

 

difficulty

 

engineering

 

incident

 
determining
 

promised

 

reproducing


matter

 

transferring

 

method

 

results

 

partly

 
Werner
 
honour
 

situated

 
smooth
 

determination


advance
 

gunshot

 

notwithstanding

 

generation

 
earliest
 

success

 

separated

 

Caustic

 
methods
 

photographic


superseded

 
interest
 

engine

 

chronometer

 

movement

 
Besides
 

operated

 
differential
 

ingenious

 

resinous