181. Eight photographs of man's face with different expressions. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
182. Drawings of two boys by Carl Bohnen. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
183. Drawing of one face with labels on chin, jaw, and cheek. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
184. Two photographs of two pairs of hands, one with palms facing inward, the other palms facing outward. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
185. Six drawings of a man's nose and face. Collection: Early 20th Century Engineering Lantern Slides Set: Face-Related Data Date: undated Format: Image Agent: unknown
186. Man shown measuring digit of finger, from .72 to .75 inches. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
187. Mean time between failure curves compared to probability of acceptance. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
188. Graph showing failure rate as a function of time and typical failure rate curve. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
189. Graph showing failure rate as a function of time and typical failure rate curve. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
190. Exponential equation used to estimate the number of failures over a given period of time assuming an exponential rate of failure. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
191. Example #1 Exponential equation used to estimate the number of failures over a given period of time assuming an exponential rate of failure. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
192. Failure curve showing the relationship between key variables. Collection: Early 20th Century Engineering Lantern Slides Date: undated Format: Image Agent: unknown
