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tude in minutes and seconds, viz. 358′ 39′′

=

5° 58′ 39′′; that is, the

difference in longitude between Boston and Washington is 5° 58′ 39", Ans.

Hence,

Rule.

Multiply the absolute difference in time, expressed in hours, minutes, and seconds, by 15, and the product will represent the difference in longitude in degrees, minutes, and seconds.

148. How many degrees west of Greenwich is New York, the absolute difference in time between Paris and New York being 5 h. 5 m. 21 sec.?

NOTE. The difference in longitude between Paris and New York is found to be 76° 20′ 18′′, and this diminished by 2° 20′ 15′′, the east longitude of Paris, gives 74° 0' 3" for the west longitude of New York. Ans. 74° 0' 3".

149. The sun rises at Springfield 6 m. 6 sec. later by the clock (Standard Time) than in Boston. What is the longitude of Springfield?

150. The absolute difference in time between the Bermudas (which are east of New York) and New York is 37 m. Find the longitude of the Bermudas.

282.

Miscellaneous Oral Exercises.

151. In 33 feet how many yards? How many rods?

152. If I hire a horse and carriage at 163 cents a mile, what must I pay for a ride of 15 miles?

153. A certain rectangular garden is 5 rods long and 3 rods wide; how many square rods does it contain?

154. How many rods round a rectangular garden which is 5 rods long and 3 rods wide?

155. How many square rods in a garden that is 6 rods square? 156. How many rods round a square garden, each side being 6 rods long?

157. How many square rods in a rectangular garden which is

10 rods long and 6 rods wide? How many rods round this garden? What will it cost to fence it at $ 1.25 a rod?

158. At $2 a square rod what will half an acre of land cost?

159. How many cubic inches in a rectangular prism or block which is 4 inches long, 3 inches wide, and 2 inches thick? How many square inches in one of its greatest faces? How many in one of its smallest faces? How many in one of the other faces? How many in its six faces ?

160. How many square feet in the surface of a cubical box whose edges are 2 feet in length?

161. How many cubic feet in a cube, each edge of which is 4 feet long?

162. What will 3 cords of wood cost, if 4 cord feet cost $3 ? 163. At 12 cents a pound what will 12 pounds of beef cost? 164. At 33 cents a pound what will 15 pounds of butter cost? 165. How many seconds in 1 m. 30 sec.?

166. How many minutes between half past 9 o'clock and noon? 167. If a man earns $12 a day, how many dollars will he earn in the six working-days of a week?

168. How many days in leap year from the 1st of January to the 10th of March inclusive? How many in a common year? 169. How many days in June, July, and August?

170. At 10 cents a dozen what will 2 gross of buttons cost? 171. At 3 cents apiece what will 2 dozen oranges cost? 172. What will 2 reams of paper cost at 10 cents a quire?

283. Miscellaneous Written Examples.

173. What cost 43 a. 140 sq. rd. of land at $40 an acre?

174. What cost 3 t. 1562 lb. of coal at $6 a ton?

175. What will it cost to build 24 m. 140 rd. of railroad at 5775 a mile?

176. A rectangular field is 40.5 rods long, and 30.5 rods wide; what will it cost to build a wall around it at $1 a rod?

177. How much land in a rectangular field that is 40.5 rods long and 25.75 rods wide?

178. What cost 82.5 lb. of coal at $7 a ton?

179. If 365 days make a year, how many days, hours, etc. are there in 0.785 of a year?

180. What is the cost of 3 pieces of cloth, the first containing 15 yards at $2.25 a yard; the second, 12.5 yards at $3.50 a yard; and the third, 8.8 yards at $ 3.25 a yard?

181. A three-sided plat of ground is enclosed by a railroad on one side and highways on the other two sides; the side next the railroad is 4.1 rods long, and the other two sides are respectively 4 rods and 0.9 of a rod in length; what is the cost of fencing this plat at $3.75 a rod?

182. How many square feet in a board which is 18.25 feet long and 2.8 feet wide?

183. Bought a load of straw that weighed 1 t. 287 lb. at $8 a ton; what shall I pay for the load?

184. Paid $7.175 for 35 gal. 3 qt. 1 pt. of vinegar; what was the price a gallon?

185. What is the cost of carpeting a room that is 16.5 feet long and 15 feet wide, the carpet costing $1.25 a square yard?

186. If a family use 29 gal. 3 qt. 2 gi. of molasses in 6 months, what is the average a month?

187. If 10 t. 1825 lb. of hay is harvested from 5 acres, what is the crop on one acre?

188. If 8 boxes of sugar weigh 2 t. 760 lb., what is the weight of a box?

189. If 9 grain-bins contain 143 bush. 2 pk. 2 qt. 1 pt. of grain, what does 1 bin contain ?

190. If a man travel 212 m. 66 rd. in 7 days, what distance does he travel a day?

191. How many years, months, and days from Apr. 19, 1874. to Feb. 7, 1879 ?

192. Find the exact number of days, hours, and minutes from Dec. 7, 1875, 4 o'clock P. M., to June 21, 1876, 9 h. 30 m. a. M.

193. Find the absolute difference in time, stating in which it is earlier, between San Francisco, 122° 26' 15" W., and Oahu, 157° 37' W.

194. Find the absolute difference in time, stating in which it is earlier, or later, between Boston and Rome, 12° 27′ 14′′ E. ; between Boston and San Francisco; between Boston and Oahu ; between Boston and Calcutta, 88° 19′ 2′′ E.

A finds that the sun sets home, and B that it sets 3 Which one came from Maine,

195. Two travellers, A and B, one from Maine, the other from the West, meet in Boston. 10 minutes earlier than at his minutes later than at his home. and how many degrees apart are their homes?

196. Find the absolute difference in time, stating in which it is later, between London, 0° 5' 38" W., and New York.

284. METRIC EQUIVALENTS.

The following equivalents of the metric measures and weights have been established by Congress for use in all legal proceedings.

1 centimeter = 0.3937 inch.

1 decimeter

1 meter

1 dekameter

1 kilometer

LINEAR MEASURE.

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2.54 centimeters. 3.048 decimeters.

= 0.9144 meter. = 0.5029 dekameter.

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1.6093 kilometers.

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1 metric ton = 1.1023 English ton. 1 English t.

=

28.35 grams.

= 0.4536 kilogram.

= 0.9072 metric ton.

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286. To reduce metric weights or measures to those in customary use.

197. Reduce 127 km to miles.

Solution. As 1 kilometer = 0.62137 of a mile, 127 km will be 127 X 0.62137 miles

=

= 78.914 miles, Ans.

Rule.

Hence,

Multiply the value of the corresponding metric unit in the table by the given number of metric units.

198. Reduce 312 m to inches.

199. Reduce 12000 K to pounds.

Ans. 12283.44 în

200. In a cubic meter how many quarts liquid measure?

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