Newly Posted Articles

GREENHOUSES: Automation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Electronic environmental control with modern technology without time clocks but with sensing and control devices and control equipment; refer to W9-115 Read More

GREENHOUSES: Best Construction Woods

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Redwood or cypress but the latter is hard to find; where wood contacts ground it should be soaked in copper napthanate preparation, which extends its usefulness by a few years. A72-807 Read More

GREENHOUSES: Design Principles

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Nine major steps: checking the local building code; the design processes; drawings and more drawings; choosing the builders; reviewing every design idea and itemizing the problem points; analyzing ... Read More

PESTICIDES: Stored for Use

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Both fungicides and insecticides deteriorate rapidly when stored in dilute solution with water. A67-901 Read More

GREENHOUSES: Electronic Controls

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Devices include a cool inlet fan, a hot air outlet fan, a fan heater, an overhead misting and watering nozzle system, an external roof-misting system, a silicon diode control and electronic thermom... Read More

GREENHOUSES: Indoor Urban Novelty

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Area size 20 by 30 ft. on the 12th floor of a New York City building; painting and sealing the apartment with epoxy paint and plastics, use of fiberglas, fertilizer proportioner, humidifier, four l... Read More

GREENHOUSES: Insulation Air-space

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Ideally, the space between outer and inner layers of a greenhouse cover should be approximately 1.5 inches thick, but spaces of three-quarters to eight inches are used; below three-quarters inch th... Read More

GREENHOUSES: Maintenance and Safety Precautions

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Never work on the roof alone; never use white lead dissolved in gasoline for shading; never use gasoline when painting; cymbidium leaf-tips have inflicted many an eye-injury so wear protective gogg... Read More

GREENHOUSES: Most Efficient Use of Sun's Radiation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The Ritelite planthouse; has its glass surfaces opposed to the surface of the atmosphere; are fixed in "normal" position in mid and higher latitudes to approximate tropic light values; refer to OA7... Read More

GREENHOUSES: Winterizing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The heaters, whether electric, kerosene or gas, or oil should be checked; the structure should be examined for leaks; a double layer of plastic insulation should be installed for winter only, a hea... Read More