xxv ni LIST OF ILLUSTRATIONS. 



PAGE 



131. Tower cooler, Buckhorn P. C. Co 528 



132. Atlas two-stage rotary cooler 530 



133. Effect of plaster on strength of Portland cement 536 



134. " " " " " " " " 538 



135. " ' ' " " setting time of Portland cement 539 



136. " "' lt " " " " " " 540 



137. " " " " " " " " " 542 



138. " " " " strength of Portland cement 543 



139. Concrete-steel bins, Illinois Steel Co Opp. 548 



140. Plan and section of stock house, Hudson P. C. Co 549- 



141. Foundation plan " " " 551 



142. Plan of bins in stock house, Hudson P. C. Co 551 



1 43. Effect of fineness on tensile strength 584 



144. Effect on strength of regrinding cement 585 



145. Effect of temperature on setting-time 586 



146. Tensile strength of various classes of cements 587 



147. Effect of sand on tensile strength 588 



148. Effect of character of sand on tensile strength 589- 



149. Ratio of compressive tensile strength 590 



150. Strength of sand-cement mortar 593 



151. " " " " " 595 



152. " " " " " . 595 



153. Effect of salt, etc., on freezing-point 599 



154. " " " " " mortar 599 



155. " " " " " " 600 



156. " " " " " " 600 



157. " " " " " " 601 



158. " " " " " compressive strength 601 



159. Effect of granulating slag, compression 647 



160. " " " ".tension 647 



161. Ruggles-Coles drier 650 



162. Vitry slag-drier 652 



163. Elevation and plan of Stewart slag-cement plant 660 



164. Effect of hardening in air and water, tensile strength, slag cement 669 



165. " " " " " " " , compressive strength, slag cement.. 669 



