150 QUARTERLY JOURNAL. 



" He must congratulate these young men from Ireland on the 

 admirable display they had made. To be a Scotsman was often 

 found a recommendation in procuring employment elsewhere ; but 

 these young men from Ireland would soon show to Scotsmen that 

 they were behind the Irish, and that, if they would maintain their 

 high character for industry and intelligence, they must be instruct- 

 ed as they were. These lads from Ireland had evinced so much 

 agricultural information, that, when ready for employment, they 

 had only to ask to obtain it. He was almost ashamed to admit 

 his belief, that there was not a similar class of youths in Scotland 

 who would answer the questions as these Irish lads had done." 



[From the American Agriculturist.] 



INCUBATION. 



In an impregnated egg previous to the commencement of incu- 

 bation, a small spot is discernible upon the yolk, composed appa- 

 rently of a membraneous sac or bag, containing a fluid matter, in 

 which swims the embryo of the future chick, and seemingly con- 

 necteJ with other vesicles around it. 



1st Day. In a few hours after exposure to the proper tempera- 

 ture, the microscope discovers that a humid matter has formed 

 within the limits of the embryo. At the expiration of twelve or 

 fourteen hours, this matter bears some resemblance to the shape of 

 a little heail ; a number of new vesicles also successively appear, 

 foreshadowing the different parts of the future body of the chick ; 

 those first formed, and most easily distinguished, may afterward be 

 recognized as assuming the shape of the vertebral bones of the back. 



2d Day. The eyes begin to make their appearance about the 30th 

 hour, and additional vessels, closely joined together, indicate the 

 situation of the navel. The brain and spinal marrow, rudiments 

 of the wings, and principal muscles, become observable. The for- 

 mation of the head is also evidently proceeding. 



3d Day. The beating of the heart is perceptible, although no 

 blood is visible ; after a few hours, however, two vesicles, con- 

 taining blood, make their appearance. One forming the left ven- 

 tricle, the other the great artery. The auricle of the heart is next 

 seen, and, in the whole, pulsation is evident. 



4th Day. The wings now assume a more defined shape, and the 

 increased size of the head renders the globules containing the brain, 

 the beak and the front and hind part of the head, distinctly visible. 



