424 Foreign and Miscellaneous Intelligence. 



may be false tracheae. Fig. 3 is a third variety, which occurs where 

 the vacuities are smaller ; these may be the elements of porous tubes. 

 Fig. 4 is the case, described as seen under the microscope ; at first 

 the lateral shoot extended like a bud only to the first mark ; at the 

 end of one hour it had reached the second ; at the end of the second 

 hour it had attained the third mark, and at the end of the third hour 

 to the full extent figured, and had produced the two small buds or 

 commencements. When the growth of the tube is seen under a high 

 power, it appears as if it were a viscid substance pushed from within 

 by an elastic fluid, which extends its length, but not its breadth. 

 By degrees, molecules, or small grains appear, in the vacuities formed, 

 and these circulate from one extremity of the canal to the other *. 



11. ON CIRCULATION IN VEGETABLES. 



On the 27th of September, MM. Henri Cassini and Mirbel made a 

 report upon the vegeto- anatomical and physiological observations 

 presented by Dr. Schultz to the Academy of Sciences. It appears 

 that a circulation takes place in vegetables, comparable, in some 

 respects, to that in animals. In fact, when the vessels in a portion 

 of stem, an inch or two long and two or three lines in width, are 

 considered, assent cannot be refused to the idea, that a vital juice 

 exists, and that it passes several times by the same path. But there 

 is this remarkable difference between the circulation in vegetables 

 and in animals of a high order, that in the latter there is one point in 

 which terminate two vascular systems very distinct from each other, 

 one carrying the blood to the extremities of the body, the other 

 collecting it and conducting it to its source ; whilst in vegetables we 

 discover no special point of departure, nor any double vascular 

 system. Vessels of the same nature form a net-work, of which the 

 meshes are so many similar circulating apparatus communicating 

 with each other, so that there is a common motion through them 

 whilst the parts live together, and a motion proper to each so soon 

 as they are separated. The discovery of M. Schultz is of the highest 

 interest for the anatomy and physiology of vegetables ; it enlightens 

 these two branches of science, the one by the other, and it proves 

 relations to exist between animals and vegetables, which before 

 were not even suspected to exist f. 



12. NEW METHOD OF MULTIPLYING DAHLIAS. 



Some dahlias belonging to M. Jacquemin having been injured by the 

 wind in the first days of June, and some branches broken off, he 

 placed them in the ground, in hopes of developing the flower. This 

 did not take place ; the vegetation languished, but the plants ap- 

 peared good, and being carefully taken up, were found furnished 



* Ann. de Sciences Nat. xxi. p. 92. 

 f Rev. Ency. xlvii. p. 784. 



