126 KANSAS CITY REVIEW OF SCIENCE. 
Company, to give the most delicate adjustment to the transmitting instruments at 
the church. ‘The result was most successful and marvelous. * 
From the opening note of the organ prelude to the last word of the preach- 
er’s voice, at the close of the service, everything was delivered to the ears of the 
listening telephoners in the most perfect manner, the tones that came over the 
wires being so full, round, and clear, and distinct, it almost seemed to the hearers 
in New York, Yonkers and Elizabeth as if they were stationed within the church 
itself directly in front of the speaker. | 
The delivery of the music was equally perfect, every note of the organ and 
of the individuals of the choir being fully brought out. The majority of the 
participators in this experiment were persons accustomed to the use of the tele- 
phone, and their unanimous verdict was that the results obtained far surpassed 
anythlng of the kind within their previous experience. 
These experiments proving successful, several new improvements have been 
suggested for trial, and there seems to be every probability that in a short time 
some new and very effective instruments will be in use, by which all who desire 
may carry the sounds of church services into their dwellings, and may also en- 
joy the best lectures, musical and other entertainments with the utmost satisfac- 
tion in their homes. Heretofore, in listening to the telephone, it has required 
effort and strain of the ear on the part of the listener. But this experiment 
shows that all sounds may be delivered in full and easy tones, readily heard, 
with all the natural characteristics, modulations, and inflections of the human 
voice. —<Scientific American. 
BLACK INK FOR STENCILS. 
The following is commended for the preparation of a black ink or paste for 
use with stencils: Bone black 1 pound, molasses 8 ounces, sulphuric acid 4 
ounces, dextrine 2 ounces, water sufficient. Mix the acid with about two ounces 
of water, and add it to the other ingredients previously mixed together. When 
the effervescence has subsided, enough water is to be added to form a paste of 
convenient consistence. ~ 
