1902.] affecting the Transmission of Electric Waves, 



Percentage 

 of maximum 



distance 

 over land to 

 over sea. 



lis 

 d 



©ooo^oocoo § 



00 CO CD CO CO lO CO ^ 



© 

 > 



mum 



istance. 



Over the 

 land. 



miles. 

 20 



17 



15 



16 



17 



14 



15 



No sig- 

 nals. 



Maxi: 

 signal d 



At sea. 



Is i i r i i i i 



a 



Height 



of" 

 aerial 

 Avire 

 above 

 sea. 



feet. 

 160 



125 



Particulars of the land. 



Surface. 



Cultivated, wet .... 

 do. 



do 



do 



Bare and dry, with 

 scrub 

 do. 



r do. 

 1 do. 



Formation, strata, &c. 



Porous coral sandstone. . 

 Do. over limestone .... 



do. 



do. 



Grritstone and marl .... 

 do. .... 



Semi-crystalline lime- 

 stone 



Total 

 thick- 

 ness. 



Jjj CO CO 00 t> CO OS CO J> 



Maxi- 

 mum 

 height. 



feet. 

 250 



500 



700 



500 



1083 



1400 



120 



5250 



Distance 



the 

 land. 



O a5 O O O « 3l 



Height 

 of 



del Icll 



wire 

 above 

 sea. 



feet. 

 125 



160 



Refe- 

 rence 

 number. 



co cococoeoctfco co 



