27 



heels into the soft material. From the face of the 

 opposite bluff we obtained some fine photographs of 

 the rain gullies upon its surface; and afterward a 

 lantern slide was made for use in the schoolroom. 

 This work was done b}^ a pupil. 



Continumg our journey, we ascended to the top- 

 most level of the valley wall, b\' a road which was cut 

 into the bluff. On one side of this road was a steep 

 wooded slope to the stream, while on the other was the 

 steep wall of shale, decreasing in height as we 

 ascended. No figures could have given us the idea of 

 the depth of the gorge which we got from the ex- 

 perience in climbing; and the pupils had but to reach 

 out and handle the disintegrated shale and dig away 

 the loosened fragments to the firm rock beneath, to 

 see through what the stream had cut its way, and how 

 the valley is still being widened by weathering. 

 Finally we reached the top, and came out upon a 

 plateau which stretched awa\' with a slight rise to the 

 upland far away against the southern horizon, where 

 the sky-line was unbroken as far as the eye could see. 

 Facing northward, \ve saw the stream far below, 

 meandering across its flood-plain within the gorge and 

 out across the plain be^^ond to the blue line of the 

 lake on the northern horizon. Then, and only then 

 could we appreciate the enormous quantity of material 

 v^'hich even i"his little creek, insignificant in the great 

 St. Lawrence system of drainage, had brought down. 



The aneroid barometer had been set to zero at 

 Euclid Avenue; and now we read it to see how deep 

 the gorge was. This was the occasion of a lesson on 

 the aneroid barometer and the method by which we 

 obtained the result. 



We returned through the valle\'- again to the street 

 cars at the avenue, and reviewed what we had seen in 

 the light of the completed work. This exursion was 

 made on a Saturday afternoon, the cost to those who 

 went bv street cars was twentv cents, and to those 



