[ io68 ] 
B. 
Baker . The Baker le&ure for the year 1778, read by Dr. John Ingenhoufz, p. 1027, 
See EleSlrbphorus* 
Balls. The force of fired gunpowder, and the Initial velocities cf cannon balls, de- 
termined by experiments ; from which is alfo deduced the relation of the initial ve- 
locity to the weight of the ihot and the quantity of powder, p. 50. See Gunpowder. 
Balls at the upper termination of conductors, to fecure houfes, &x. from lightning, 
not fo ufeful as points, p. 154 — 159. Rounded conductors fecure buildings againft 
the effects of lightning better than pointed ones, p. 24.5, &c. Pointed conductors 
recommended as the mod effectual for this purpofe, p. 314 — 317. Inquiry whether 
fharp or blunt-pointed conductors are the fitted: to preferve buildings from lightning, 
p. 801 — 820. Experiments on eleCtricity, being an attempt to (hew the advantage 
of elevated pointed conductors, p. 823 — 85 5. Remarks on Mr. Wiifon’s experi- 
ments on the nature and ufe of conductors, 855 — 860. New experiments on the 
Leyden phial, refpeCting the termination of conductors, p.999 — ion. 
Bamboo (a kind of reed), houfes built with it in the ifland of Sumatra, p. 162. How 
the inhabitants write with it, p. 164. Ufed in their fortifications, p. 165, 166. 
Baptifms , marriages and burials in the paridi of JBlandford Forum, Dorfet, during 
forty years, p. 615. S zz Blandf or d Forum. 
Bark of oak, why preferred for the purpofe of tanning, p. 113. How prepared for 
that ufe, ibid. 
Barker , Thomas, efq. ab lira Cl of his regifter of the barometer, thermometer, and rain, 
at Lyndon in Rutland, in the year 1777, p. 554. See Lyndon. 
Barometer , Hate of it at Fort St. George in the Eaft Indies during the months of 
OCtober, November, and December, 1776, p- 182 — 188. And in January and 
February 1777, i8'8— 192. AbftraCl of a register of the barometer, thermometer, 
and rain, at Lyndon in Rutland, for the year 177, p. 554. See Lyndon. State of 
the barometer at Briflol for the year 1777, p. 567. At London for each month 
throughout the fame year, p. 474 — 597. GreateH, leak, and mean height of it 
there in each month, p. 398. 
Barometer. Comparifon between Sir George Shuckburgh and Colonel Roy’s rules for 
the meafurement of heights with the barometer, p. 681. General correfpondence of 
their refults, ibid. Some little difference in their enquiries arifing from the ex- 
pan non of quickfiiver and the expanfion of air, p. 682. On the equation for quick- 
silver, p. 682, 683. On the expanfion of air, p. 683, 684. A comparifon of their 
obfervations, p. 683. Remarks on the comparifon, p. 686, 687. A new rule for 
-reducing the obfervations, p. 688. 
- Barowby , near Leeds, a journal of the quantity of rain that fell there from 1772 to 
p- 5720 
Barr, 
