Category: Orchid Doctor

ETHYLENE: To Measure Content in Greenhouse on a Scientific Basis

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use of the gas chromotograph outlined; refer to A69-415 Read More

EVAPORATIVE COOLERS: Algae Control -- Use Physan 20. A78-495 -- How to Build One

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Cost of materials was less than $100, not including fan; instructions; refer to A75-584; general information on function and maintainance. A61-541+; A64-377+; A74-396+ Read More

EVAPORATIVE COOLERS: In Louisiana

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago High humidity limits the effectiveness. A78-309 Read More

EVAPORATIVE COOLERS: Use of Copper Sulphate on the Wet Pad

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use 2 ppm. in the water periodically, A78-403 Read More

EVAPORATIVE COOLERS: Used Throughout the U.s.a.

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The fan and pad cooling system is the most popular. A80-356 Read More

FAN-JET SYSTEM: For Ventilation and Heating

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A fan at the end of the greenhouse is attached within a long tube of polyethylene punched with holes every two feet; heated air from the furnace or fresh air from outside is circulated. A67-383+; A... Read More

FANS: For Air Circulation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use small fans (eight or ten inches) so as not to produce excessive air currents; in large greenhouses use turbulator fans, suspended from the top. A63-392 Read More

FANS: Proof of Their Efficacy

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It has been proven under .many conditions; so, how did the Victorians get by without them? A81-810 Read More

FANS: To Reduce Pests

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use furnace filters tied on the intake side of the fan to remove dust, some bacteria, fungus and pests. OIE85SeptT5; very likely more efficient than a negative ion generator. RMH Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More