JANUARY 12. 1899. 



The Weekly Florists^ Review* 



155 



Rose Houses of Mr. Henry Hentz, Jr., Madison, N. J. 

 [Erected by Lord & Burnham Co. | 



the place is a model one and well 

 worth a visit. PENN. 



HEATING. 



In reply to Z. K. J., the mains, being 

 of two and one-half inch pipe, are of 

 ample capacity for the feeding of the 

 coil containing only two hundred and 

 sixty-six lineal feet of two-inch pipes. 

 Considering the long run which this 

 flow pipe makes before reaching the 

 coil, about one hundred and fifty 

 feet, it would be well to wrap the pipe 

 with hair felt or other low cost non- 

 conducting material, in order to pre- 

 vent loss of heat from the main be- 

 fore it reaches the coil. 



The amount of radiating surface in 

 the coil is ample to maintain a tem- 

 perature of sixty-five degrees in the 

 leanto house, if effectively arranged. 

 1 notice that the coil consists of seven 

 two-inch pipes placed on the side 

 wall of the greenhouse; this is where 

 the troul)les originate. A vertical coil, 

 where circulation is all in one direc- 

 tion, is not effective in water heating, 

 especially where as many as seven 

 pipes are used, as the circulation will 



take the top or bottom pipes, as the 

 case may be, and miss the interme- 

 diate pipes, excepting in the case of 

 very heavy tiring. It were better to 

 remake the coil in two parts, and 

 place them, horizontally, below the 

 bench, the lower coil to have four 

 pipes and the upper three pipes, both 

 flowing in the same direction as at 

 present, downwards towards the office, 

 and having a downward grade of at 

 least four inches in their length. 



Also see that the return main from 

 the coil to the boiler has ample down 

 grade all the way, and it would be 

 better to make a separate connection 

 of this main to the boiler, as if run 

 into a main, having a stronger flow, 

 the flow of the weaker current is lia- 

 ble to be cut oft almost entirely. 



H. W. GIBBONS. 



New York. 



A CHEAP GREENHOUSE. 



I have lately erected a cheap green- 

 house. The glass has a lap of over an 

 inch, and the glass was not properly 

 cleaned of paint and putty stains. 

 Plants burn badly, especially rubbers 



and palms. Have no top ventilation. The 

 whole front of the house is made of 

 shutters that are taken down and put 

 up on cold nights. Would like to know 

 the cause of plants scalding. Some of 

 them have holes burnt clear through 

 them. FLORIDA. 



Even in the balmy and sunny 

 climate of Florida it is no economy to 

 build such a house as the one de- 

 scribed. Ventilation must be supplied 

 at the ridge, for there is where the 

 hot air resides. The burning is caused 

 either from poor glass, great heat, or 

 the plants being allowed to get dry. 

 We have tried most of the well-known 

 commercial palms out of doors in the 

 broad sun during our summers, and if 

 properly supplied with moisture at the 

 roots they do not burn in the least. A 

 latania or kentia, for instance, in a 

 tub, and well supplied with water, 

 does not hurt in the least, but put a 

 small specimen in the center of a vase 

 in a cemetery where it is crowded for 

 root room, and perhaps watered but 

 once in forty-eight hours, and they 

 will burn right up. 



