﻿Acetylene. 



Ill 



of lighting. It is to be remarked that authorities differ 

 widely in their estimates, and the cost of gas and electric 

 lighting varies greatly with the locality. Electricity is 

 particularly advantageous when it can be put to other 

 uses during a part of the day. 



100 Candle Light During One Hour. 



Arc light 



Incandescent lamp 



Boston gas, $1 per 1000 

 Acetylene, |10 per 1000 



Petroleum lamp 



Carcel oil lamp 



Paraffine candle 



Spermaceti candle 



Wax candle 



Stearine candle 



Tallow candle 



0.09- 



0.46- 



20 



21 to 3 

 0.621b.- 





COST. 





CENTS. 



-0.25E 



1—2.5 



-0.85E 



3-5 



cu. ft. 



2.0 



cu. ft. 



2.5-3 



-1.01b. 



2.0 



0.91b. 



8.0 



1.71b. 



28.0 



1.71b. 



54.0 



1.71b. 



61.0 



2.01b. 



33.0 



2.21b. 



32.0 



■5 s; ic 



o o-o 



57— 158c 

 290--536C 

 3380c 

 1000— 1200c 

 3360c 

 4200c 

 9200c 

 7960c 

 8940c 

 9700c 



The Chemical Properties of Acetylene. 



A series of very simple experiments will illustrate the 

 most important properties of acetylene. 



To compare its density and its explosive force with 

 those of common gas take two lamp chimneys closed at 

 the top and bottom with corks, and each fitted with an 

 inlet tube at the bottom and with a large brass tube at 

 the top. Fill one with gas and the other with acetylene 

 and light both gases at the upper tube ; then remove the 

 rubber tubes from the inlet tubes. The flames will con- 

 tinue to burn at the upper orifice, because each gas rises, 

 floating on a layer of air, which rushes in from below, 

 and the relative densities of the gases may be estimated 



