312 DOMESTICATED TROUT. 



pike, mullet, yellow perch, and one large Esox, well known 

 to visitors as the " big pickerel." These fish are quite 

 large, and though of not much profit are a fine sight, and 

 afford observers an opportunity of studying their ways. 

 In the fall of this year, the trout, now two years old, which 

 took diplomas at the last year's agricultural fairs, received 

 a diploma and silver medal at Boston at the exhibition of 

 the Massachusetts Charitable Mechanics' Association. In 

 the same fall, carbonized or charred wood, for hatching 

 trout eggs, was tried at the hatching house in Charlestown, 

 and was found to answer its purpose perfectly. This was 

 the year of the great freshet, which wrecked so many trout 

 ponds. It fortunately did no harm at the Cold Spring 

 Farm. 



1870. 



The next year, 1870, the demand for trout eggs and 

 young trout had very much increased. Preparations to 

 meet this demand were made at the Cold Spring Trout 

 Ponds. The carbonized hatching troughs were introduced 

 throughout in the hatching buildings, and 250,000 trout 

 eggs were laid down in them. In the mean time a fine lot 

 of yearlings had been brought through the last year. Sev- 

 eral consignments of large trout had been sent to Fulton 

 Market, New York, and one of the largest hotels in Bos- 

 ton had been supplied through the summer. 



1871. 



The next spring, 1871, the demand for eggs and young 

 fish was a quarter of a million more than the establishment 

 could furnish. The large trout brought, in Fulton Market, 

 in April, $ 1.25 per pound. The right to use charcoal and 

 carbonized wood for hatching fish was patented June 20, 

 1871. 



Four new ponds were built this year, 1871, and lined 

 with carbonized two-inch plank. A large number of year- 



