( 8 94 ) 
By the fame Art he attempts to give a reafon of the 
Earthquake in Jamaica, Jun, b,9%. femihora ante merid. 
confulting the-iame Treadles of Dr.Gtad, aod a/firms 
the fame may be obferved of the Earthquake thac hap- 
pened at London, and other parts, Sept. Z.St. V. 5,1. a 
little after i p. m, 
He concludes thefe Warnings are given the World to 
forfake their Wickednefs, andefpecially Idolatry, which 
will at laft bring on the final Conflagration. , 
• i 
4. Traite des Mtyens de rendre les Rivieres na- 
vigable* ^ &c. a Paru^ 169$ in 8^- 
THE Author of this Treatife tells us in the Preface, 
that the Methods and Machines he propofes are 
not meer Imaginations, but are already put in pra&ice 
chiefly by the Hollanders, who have the mofl cultivated 
this matter. Coming to the fubjed in hand, he fup- 
pofes firft, that all Impediments to its being Navigable, 
are-of two forts, either in the Channel it lelr, or out of 
it; - the latter are caufed either from the badnefs of the 
Banks, on which Men and Hoifes cannot eafily paftto 
draw up the VelTels againfl the Stream, fuch as Trees, 
crefs Rivulets, &c. The other Hindrances in the Chan- 
nel are from Rocks, inequality of the bottom, Falls, 
Mills, dividing of the Stream , Rapidity, overflowing 
and breaking down of the Banks, Banks of Sand, 
all which he reduces chiefly to Four ; too great a^breadth 
in feme places and by that reafon Shallowness, efpe- 
cially in the Summer ; Water-falls or Cafcades ; Rocks 
to be met within the bottom; or hilly, Mills. For each 
of thefe he propofes fbme Remedies ; and for fuch as 
arife from the Banks, they are eafie to be overcome by 
