good brick from a poor one.

93. In how many ways is brickwork "bonded" to make good work in heavy
walls?

94. What is hydraulic cement, and how many kinds do you know of?

95. Which do you consider the better quality, Rosendale or Portland,
and why?

96. What is mortar composed of, and how mixed?

97. What kind of sand should be used, and how do you test its quality?

98. What is the meaning of the term "setting" as applied to cement?

99. How would you test cement?

100. What is concrete, of what composed, and in what proportion should
its ingredients be mixed?

101. Name the common kinds of wood used in building.

102. What kind of timber resists decay longest under ground?

103. How may timber be preserved from decay?

104. What do you understand by limit of elasticity as applied to a
beam under strain or pressure? What is meant by the neutral axis of a
beam?