The daily morning journal and courier., 1895-06-26

silver Wire, IS lowered 10 the ueSlreu
 level. From the small coils in the tub
 ing, which are themselves electrically connected, connection is made through
 the water with small battery inside
 box on the top of which is the dial
 marked with the different tempera- | lures, and provided with 0 pointer which may be turned by the operator. | When the coil, which takes up about as
 much space as a half-pint bottle, is at the required depth the operator takes
 small telephonic receiver from a neat little holder on the side of the box,
 and, applying it to his ear, begins to
 turn the pointer around the dial. Inn
 mediately he hears what seems to be @
 big horsetly in the receiver, but which is in reality an electrical "buz2er," con neoted with the coils in the water be- low The operator finds that the buzz zing increases and decreases according
 us he causes the pointer to approach or
 to move away from a certain section
 of the dial, and by varying the needle point within that section he hits upon one point at which no sound comes from the "buzzer" at his ear. One tenth of degree either way will start
 the buzzing again, and that tells him
 that the present position of the pointer
 is such as to indicate the figures denot-
 Ing the temperature of the coils in the water below him. To find the tempera- l ture ten feet nearer the surface of the
 water the coll has simply to be lifted
 that distance when the reading on the dial is obtained as before, and any f,p 1rc
 out drawing the coils to the surface.
 Other instruments by which tempera
 lures below the surface could be ob
 tained have necessited the drawing up
 of a self-settlng thermometer for each
 reading, or have been inaccurate or too
 complicated and cumbersome for trans
 portation, This instrument is easily
 portable, for 1t is contained in a wood-
 en box about seven inches square by
 eleven inches deep, and weighing per
 haps fifteen pounds.
 For tho conmoner uses of the instru- ment it Is arranged to dispense with the
 buzzing telephoning attachment and employ an ordinary galvanometer, so
 that the pointer will at once adjust it- self automatically and indicate the tenn perature on the dial without having to be turned by hand. With such an ar- engagement the instrument will proba- ply be of great use in such places asl cold storage warehouses, for a dial placed in any one place can be connect ed with each room or air box in the building by electric wires, which, sue cessively thrown into connection with the dial by means of an ordinary switchboard, can be made to indicate the temperature of any one or all the rooms. In the same way the instru- ment will be available for use in schools and all public buildings where 1t is desirable for the janitor or en- gineer to know the temperature of a particular part of the building while | standing at hls own post near the boil CTS or furnaces; in incubators or on board ships. where an instrument plac- | ed amid the cargo in the hold will show | the temperature of places where q man cannot go The instrument is, in fact, l specially designed for the taking of | in all places ordinarily | to man, and it is therefore | for all high temperature work, l such as recording the temperature of | hue gases. The inventors are now con an instrument that will be capable of recording temperature as high as 1000 degrees Fahrenheit, and with the coil of such an apparatus plac- ed in the tall chimney over a boiler the engineer could see at once the temper lture of the gases escaping and be able to tell just how much heat Is being wasted. Manufacturing chemists will probably be interested in that part of he instruments performance.
 The instrument is to be known as the It will be exhibited at he International Geographical con yress at London in July, and will ap- 1ear as part of the exhibit of the Mas 5achusetts Institute of Technology.