" Rrt*1 Itnttsh > 



Plate IV. 



DOUBLE AUTOMATIC SIREN 



FOR HIGH AND LOW NOTES 



WITH CENTRIFUGAL GOVERNOR 



Scale 3inches to afoot 



j ; 



Ti 



Admission Port •T-TI I j| ^ [M 



.1 r 



B 



Admission Rjrt 

 to Low Note Siren 



\L SECTION 



! rt-^-^tr.fugal 

 j H Governor 



PLAN OF § 

 GOVERNOR 



HALF PLAN 

 AT A 

 WHICH N0TE5IP.CN 



3a,400»;bratioos 



p«r minute - 



HALF PLAN 



AT B 

 OF LOW NOTE SIREN 



l6,800vibrations 

 per minute 



APPARATUS FOR FIRING GUN COTTON CHARGES 



8 WICK DOUGLASS LAMP 



Scale 3inches toafoot . 



Eleclnc Cable 



Detail, Showing 



endofcable 

 with charce 

 AFFIXED 



Scale 3inches=lfoot 



Section of Lantern 

 showing side view 

 of Apparatus 



The dotted lines show the jib t 



to receive theeharge.( 



The full lines show the jib raised 



tiipobition for firing 



Electric Cable 



• red. 



■ Electric 



Scale \ inch to afoot 



Scale, i inch to a. foot 



■ . ■ r- 



'&— 4- 



< \-< i 



4= 



Sca7e3 inches io 1 foot - 



Stop Val' 



^pSi^S'r"- 



I 



* BurningUr*) of Mineral OH . 



•A Rack Swindles 



Micrometer Valve, 



IUwitroMng Sir James Douglass's Paper On Improvements ut Coast Signals 



