In i860 he removed with his father to St. John, N. B., 

 for the purpose of organizing with him a college high 

 school; but much of 3'oung Hartt's time was at once de- 

 voted to the exploration of the rocks in the vicinity of St. 

 John. It was these researches that first made him widely 

 known to the scientific world. His discovery of the remains 

 of fossil insects in the Devonian shales of St. John attracted 

 the attention of Prof. Agassiz, and helped to decide the 

 future course of the young provincial geologist. Accept- 

 ing an invitation from Prof. Agassiz to become a student 

 at the Museum of Comparative Zoology, he went, in 

 1861, to Cambridge, where he spent the greater part of 

 the next four years. Here he diligently improved the 

 great opportunities afforded for study and original 

 research, and made rapid progress. The great tempta- 

 tion to devote himself to the investigation of the immense 

 stores of undescribed material contained in the Museum, 

 did not entirely withdraw his attention from the study 

 of the geology of his native land, his vacations being 

 mostly spent in continuing the explorations already 

 begun in the Provinces. 



Before he went to St. John in i860, the geology of 

 southern New Brunswick was very imperfectly known, 

 and it was about this time that careful researches were 

 begun. Hartt carried on his work, partly alone, and 

 partly in connection with the Survey of southern New 

 Brunswick, under Prof. L. W. Bailey. He did not, how- 

 ever, confine himself to New Brunswick, but gave much 

 time to the study of the geology of Nova Scotia. His 

 name figures prominently in the report of Prof. Bailey, 

 published in 1865, and also in Dr. Dawson's "Acadian 

 Geology," (2d ed., 1868). Many of his results were pub- 

 lished in the reports of others, and it is thus difficult to 

 tell how much we should accredit to Hartt; but some of 

 his results have been given us separately, so that we are 

 able to make the following general summary of his prin- 

 cipal discoveries in the Provinces. 



In 1 861 he discovered that the Devonian shales at 

 Duck Cove, Lancaster, near St. John, were richly fossil- 



