106. How far apart should the knots of a log-line be to indicate
every half-minute, a speed of one mile per hour?
107. Several persons are bound to pay the expenses of a law process,
which amount to £800, but three of them being insolvent, the rest
have £60 each to pay additional. How many persons were concerned?
108.
If five times four are thirty-three,
What will the fourth of twenty be?
109. A locomotive with a truck is travelling over a straight level
line at the rate of 60 miles an hour. A man standing at the extreme
rear of the truck casts a small stone into the air in a perpendicular
direction. The stone travels upward at an average rate of 30 feet per
second for 3 seconds; the height of the man’s hand from ground when
the stone leaves is 15 feet. At what distance behind the train will
the stone strike the ground in its descent?
A Tombstone in an English Cemetery.
Many quaint and puzzling epitaphs are often to be seen engraved
on several of the tombstones in some of the old cemeteries at
Home. The adjoining illustration represents a tombstone in the old
burial-ground of London--Kensal Green. It might “liven” up the reader
to discover the scheme of kindred as given in the inscription.
[Illustration: