CONTENTS. ix 



(c) logarithms for / between -49 and 399 C by i steps . . 130 



(d) +400 and 1990*0 by 10 steps . 132 



113. Density of moist air: h/ 7 60, h from i to 9 133 



114. " " " " log A/y6o, h from 80 to 800 133 



115. " " " 0.378^ in equation h = B 0.3786 135 



116. Maintenance of air at definite humidities 135 



117. Pressure of mercury and water columns 136 



BAROMETRIC TABLES 



1 1 8. Reduction of barometer to standard temperature 137 



119. gravity, in. and mm, altitude term 138 



120. " latitude 45, o to 45, mm 139 



" 45 to 90, mm 140 



122. o to 45, inches 141 



123. " 45 to 90, inches 142 



124. Correction to barometer for capillarity, mm and inches 143 



125. Volume of mercury meniscus in mm 3 . 143 



126. Barometric pressure corresponding to the boiling point of water: 



(a) metric scale 144 



(b) inch scale 144 



127. Determination of heights by the barometer 145 



ACOUSTICS 



128. Velocity of sound in solids 146 



129. " " liquids and gases 147 



130. Musical scales 148 



131. " " 148 



132. Fundamental tone, its harmonics and equal tempered scale 149 



133. Relative strength of the partials of musical instruments 149 



134. Characteristics of the vowels 149 



135. Miscellaneous sound data 149 



AERODYNAMICS 



136. Kinetics of bodies in resisting medium, Stokes law 150 



137. Flow of gas through tubes 150 



138. Air pressure, large square normal planes, various speeds 151 



139. Correction factor for small square normal planes 151 



140. Effect of aspect ratio 152 



141. Ratios of pressures on inclined and normal planes 152 



142. Skin friction 152 



143. Variation of air resistance with aspect and angle 153 



144. " " shape and size 153 



145. " " " " and speed 153 



146. Friction . 154 



