Dimensions & Weight:
Tall Admiral FitzRoy Storm Glass -
10 3/4 inches (27.3 cm) tall, 1 7/16 inches (3.7 cm) in diameter
Glass Base -
2 1/4 inches (5.7 cm) in diameter
10 1/2 ounces (297 grams)
Small Admiral FitzRoy Storm Glass -
6 inches (15.2 cm) tall, 1 inch (2.5 cm) in diameter
Glass Base -
1 7/8 inches (4.7 cm) in diameter
2.9 ounces (82 grams)
Storm Glass Capsule -
3 7/8 inches (9.8 cm) tall and 1 inch (2.5 cm) in diameter
1 5/8 ounces (46 grams)
Used by Admiral FitzRoy on his historic voyage with Charles Darwin
Ambient temperature affects the liquid's solubility, resulting in crystal formation
Formation of crystals (or lack thereof) are used to interpret the weather
Admiral FitzRoy was commander of the HMS Beagle and participated in the Darwin Expedition from 1834 - 1836. In addition to his naval career, FitzRoy did pioneering work in the field of meteorology. The HMS Beagle's instrumentation for the Darwin Expedition included several barometers and a storm glass, which FitzRoy used for weather forecasting. These fascinating instruments makes a great conversation piece for a boat or office. The unique Storm Glass Capsule is perfect for the hobbyist who is interested in making a FitzRoy Storm Glass. This FitzRoy Storm Glass Capsule can be used as-is, or a decorative metal or wooden housing can be made. The renowned sailor and meteorologist Vice-Admiral Robert FitzRoy brought his storm glass aboard the HMS Beagle during his historic voyage with Charles Darwin.
The ambient temperature affects the liquid's solubility, resulting in different formations of crystals. The formation of crystals are used to interpret the weather. The rate of temperature change also affects the crystal growth, so the storm glass crystals retain a recent history of temperature changes. If there are large flakes throughout the liquid, it will be overcast in temperate seasons or snowy in the winter. Threads near the top indicate that it will be warming or windy. If the liquid contains small stars on sunny winter days, then snow is coming. If there are crystals at the bottom, this indicates frost. A cloudy glass with small stars indicates thunderstorms. If the liquid in the glass is clear, the weather will be bright and clear. Instructions for interpreting the crystal patterns are included.
The Tall Admiral FitzRoy Storm Glass measures 10 3/4 inches (27.3 cm) tall, 1 7/16 inches (3.7 cm) in diameter, the glass base is 2 1/4 inches (5.7 cm) in diameter, and the Storm Glass weighs 10 1/2 ounces (297 grams). The Small Admiral FitzRoy Storm Glass measures 6 inches (15.2 cm) tall, 1 inch (2.5 cm) in diameter, the glass base is 1 7/8 inches (4.7 cm) in diameter, and the Storm Glass weighs 2.9 ounces (82 grams). The Storm Glass Capsule measures 3 7/8 inches (9.8 cm) tall, 1 inch (2.5 cm) in diameter, and weighs 1 5/8 ounces (46 grams).