1876.] 



AND HORTICULTURIST, 



105 



plant shifted into larger pots, as the old one be- 

 comes filled with roots. 



The principal varieties of oranges and lemons 



are — 

 Sweet Orange. 

 Bitter Orange. 

 Finger Orange. 

 Blood Orange. 



Varieg. leaved Orange. 

 Sweet Lemon. 

 Sour Lemon. 

 Citron. 



Otaheite Orange. The Lime. 



Myrtle-leav'd Orange. Californian Lime. 

 Mar darine Orange. Dwarf Lime. 

 Fr. Hybrid Orange. The Pummelce. 



In regard to flowering seedling Geraniums the 

 process which I generally practice after the plant 

 has grown some eight inches is as follows: I 

 make a six-inch cutting of the top, dry it in the 

 shade for a day, and insert it in sand or sandy 

 soil, keeping it moderately dry until rooted, 

 when it should be potted and shifted, as it re- 

 quires, or planted out in the ground. 



By this means it will be found that seedling 

 Geraniums flower much quicker and grow 

 dwarfer than on the seed roots, and where room 

 is no object, and stumps are kept, you get two 

 plants instead of one, which is a great advantage 

 if the seedling be worth preserving, &c. 



COAL TAR. 



BY J. F. M. FARQUHAR, EAST PROVIDENCE, R. I. 



A few years ago I had some experience with 

 the use of coal tar in two forcing pits, which may 

 be interesting to some of your readers. 



The wooden frame-work of the beds having be- 

 come decayed, it was necessary to renew them. 

 In order to make the new frames last as long as 

 possible, the inside of the planks were given a 

 coating of coal tar. The work was done in sum- 

 mer, so that it had time to dry and harden before 

 the soil was put in. I had recommended to my 

 employer pitch tar in preference to the cheaper 

 article, fearing that bad effects might result if the 

 high temperature in the pits should melt the 

 coal tar. But in the fall, when the soil was 

 placed in the beds, so hard and dry had it be- 

 come that I thought the work could not be done 

 better, or more cheaply, and my earlier appre- 

 hensions were removed. Winter-flowering plants 

 and early vegetables occupied the beds, and all 

 did well for about three months after being 

 planted. 



The weather having become intensely cold, 

 the heating apparatus had to be kept at work 

 night and day. Just at this time the plants 

 seemed to lose their healthy look; Koses and 

 Bouvardias began to sicken, their leaves to turn 

 yellow and fall off. I at once suspected what the 

 trouble was, and in order to remedy the evil as 

 far as possible, I removed these plants out of the 

 beds and potted them. I found that their young 

 roots were black and lifeless from being poisoned 

 by the tar. The continual heat from the pipes 

 immediately under the beds had melted it, and 

 the gases being absorbed by the soil poisoned 

 it. In other parts of the pits, Carnations, Helio- 



