[ 1*5 3 
Don Vincent Tofino Captain of a frigate in the 
King’s fleet, and Director of the Academy of the 
Guarde-marines^ has had a great ihare in thefe 
•obfervations. He is no lets deflrous, than rnyfelf* 
that they fhould be communicated to the Royal 
Society : for which purpofe, I requeft an anfwer 
from you, which you will pleafe to addrefs to. 
Sir, 
Your mod humble obedient fervant, 
JOSEPH VARELAZ, 
Lieutenant in the Royal Navy, and 
Profeffor of Mathematicks in the 
Academy of Guarde Marines. 
Dn. Vincente Tofino, Capitan cle Fragata de la Rl. Armada, 
y Dire&or de la Academia de Guardias-Marinas, ha tenido mu- 
cha parte en eftas obfervaciones. Defea como yo comunicarlas 
a la Sociedad Real, ji cuyo fin fuplico a vm. que me refponda, y 
que me mande como a 
Su mas rendido y obediente fervidor, 
JOSEF VARELAZ* 
Teniente de Navio de la Real Armada y Profefor 
de M'athemathicas en la Academia de Guardia* 
Marinas. 
2 
XIV. Of 
