(ro27) 
At prefent I am finiihing another* Inftead of four paints 
icpIayechoB one Steel poinf, (landing on a Diamond rhe 
making of which I do intend to publifli. I hope it will be 
of great nfe for itsexaSnefs and fpeedinefs of working. 
I am at prefenc making a filver Pianifphere of two foot di- 
ameter for the King; the Invention of thacfauious Aftronomer, 
and my very good friend, Mr. Caffini. It ffjeweth a very eafie 
way to know and End out moft of the fixed Stars^and the hour 
of the night very fpeedily. 
ExtrnBof a Letter from Mr, ]ohx\ Conyers, of his Improve* 
-mentof S/r Samuel MorelandV fpeakmg Trumpet^d^c, 
HAving fome years fince try 'd to make one of Sir S. More- 
iam'sjpeaki^g trumpets of Tin, that is, tinned Iron Plate ; 
and finding it to ferve, as well as Copper or Glafe ; I there- 
upon thought of feveral ways for reducing the fame into fome 
more concrafied form , without abating its power; and by Dr. 
Goddard prefented to theRoyal Societyjat one of their Meetings 
(then ufually ac Arundel Hou[e) the Kejlt£tjng trumpet 
here figured, Ic confifleth of two Parts. The'utmoft(B b) 
is a large Concdve PyrAmid^ al;)out a yard long, (or may be 
of any managable length ) opeR at the hafe ( b ) , and 
clofed, not with a fiit^bnt ^ concave head ^ at the Cone (B}» 
Within this is faftned a bended Tube z) as in the Figure. 
In theprefence of the Ropl Society it was then alfo experic 
mented, That this trumpet did diftinfily deliver certain words 
from the faid Houfe crofs the Garden, and the River thameSy 
and that againft the Wind which was then ftrong : and the 
words were written down by ope that was fent over for that 
purpofe. Whereby it appeared, That a Refit ffing trumpet after 
this or fome other like manner,of Wood, Tioj Pewter, Stone or 
EarthjOr which may be beft^of Bel! mettle, will carry the voice 
as far, if not farther ^ than the long one invented by Sir Sa- 
mutl Morehnd Bcfides that it feems to take off from the 
aftonifliingnoyfenear at hand^ which happens in the ufe of the 
faid long Trumpet ; fo that it may be ufed withindoors^ with 
advantage, upon feveral occafions» 
