Mr. Mitchell on the Electric Telegraph. 

 TABLE II. 



Ill 



Prestonpans Beer, 



Small Beer, 



Table Beer,. 



Common Porter, 



Brown Stout, 



Double Brown") 



Stout, I 



Imperial, 



Export Ales, 



India Ale, 



No. 3 Ale, 



No. 4 Ale, 



Port Wine, 



Madeira, 



Sherry, 



Guiness's Dublin, 

 Claret, 



FIRST EXPERIMENT. 



•9928 

 •9963 

 •9919 

 ■9918 

 •9902 



•9858 



•9869 

 •9807 

 •9837 

 •9836 

 -.9817 

 •96G8 



•9777 

 •9868 

 •9838 



4' 



2- 



4-6 



4-7 



5-6 



8-6 



8- 



12-4 

 10-1 

 10'25 

 \l-6 

 •23-6 



14-9 

 8-6 

 10^ 



Liqui 



59-056 



25-14 



65-117 



79866 



90-664 



117-992 



1380 

 167-68 

 189-07 

 140-52 

 160-54 



3-26-15 1 16-3 

 4-75 

 233-93 

 105^43 

 163-0 



2^95 

 V25 

 3-25 

 3-90 

 4-53 



6-96 



8-36 



9-4 



7-02 



8-02 



1409 

 5^27 

 8-15 



3-51 

 4-32 

 2-75 

 3-84 

 3-3 



4^ 



5-5 



3-7 



2^75 



5^7 



6-67 



2-35 



3-96 



3-57 



5- 



3-85 



TABLE III. 



Preston pans Beer, . . . 



Small Beer, 



Table Beer 



Common Porter, 



Brown Stout, 



Dble. Brown Stout,. 



Imperial, 



E.xport Ale, 



Liquor. 



2-525 



1-60 



3-07 



4-035 



4-58 



6-22 



7-09 



7-96 



3-565 



4-285 



2-725 



3-845 



3^285 



4- 



5-5 



3-75 



93-91 

 94-12 

 94-21 

 9-2-13 

 92-24 

 89-78 

 87^41 

 88^29 



India Ale,.. 

 No. 3 Ale,. 

 No. 4 Ale, . 

 Port Wine, 



Sherry, 



Madeira,.... 



Claret, 



Samshoo,... 



Liquors. 



8-97 



7-055 



7-855 



16-3 



14-09 



11.83 



8-15 



24-00 



2-75 



5-7 



6-675 



2-35 



3-57 



3-95 



3^85 



89-28 



87-25 



85-47 



81-35 



82-44 



85-22 



88- 



76-00 



Mr, Alexander Mitchell brought before the Society an improvement 

 which he has made in the construction and -working of the Electric Tele- 

 graph. He began by describing the telegraph generally as consisting of 

 three parts, namely, a battery to generate electricity, a -wire to convey it, 

 and a mechanical arrangement to communicate signals at once to different 

 and distant places. The moving power in every case being the same, tho 

 difference in tho various instruments in use consists solely in the mechanical 

 combinations. Already sixty different machines have been invented, 

 upwards of thirty of which have been patented. Tho objects aimed at in 

 these diversified forms of the telegraph have been chiefly in the simplifi- 

 cation of tho arrangements, and the tranismission of a greater number of 

 signals at tlio same time. The desideratum still is, the transmission of intel- 

 ligence by means of one wire, as rapidly and distinctly as it is now done by 



