Turret Season is officially over! Last week we changed the solution in the turret tank and hooked it back up to its electrolytic reduction (ER) system. This is a long and exhausting process which takes about a week to complete. Let’s look at the steps involved in readying the turret for the off-season.
This week I thought it might be fun to look at one of our more unusual types of artifacts that I’ve been treating. We have tons (literally) of iron and copper artifacts in the lab, but for every two pipe flanges bolted together, there is also one gasket keeping things tight. The humble gasket can be found throughout the Monitor’s engine room, sandwiched between the copper piping and iron machinery parts. Its job was to keep the fittings air tight and prevent leaks. Most gaskets are made from layers of rubber and textile pressed together, but we do have gaskets made entirely of rubber and a few that are actually leather.
In addition to the gaskets, rubberized fabric, buttons, and combs have also been recovered. Despite the evidence of wide use aboard the Monitor, modern rubber was a relatively new material in 1862. Natural rubber was used before the 1800’s, but due to its unstable nature, it wasn’t suitable for many applications. Thanks to a number of people experimenting with additives and curing processes, more stable forms of rubber became commercially available. For instance, Charles Goodyear (who’s patent is stamped on the Monitor buttons) is credited with patenting vulcanized rubber which is much harder and durable than natural rubber.Read more
Join us this Saturday, January 14, for our monthly Civil War Lecture series!
This month we’re looking at the technological revolution of the 1800’s which gave birth to that marvelous ship the USS Monitor. But the Civil War “Battle of the Ironclads” is only a small part of the fascinating journey from sail to steam and wood to iron. From a revolving turret to rubber buttons, life aboard the Monitor was a reflection of changes occurring globally thanks to the civilian Industrial Revolution and the modernization of the world’s navies. We’ll examine the inventions in the decades leading up to the American Civil War and the evolution of technology as a result of that fateful day at Hampton Roads!Read more
Every museum goer has encountered warnings about touching artifacts, but have you ever wondered just how damaging that contact can be? I think we would all agree that leaping a barrier and picking up a vase is a definite bad idea, but what about resting your hand on a chair or poking a polar bear specimen? The truth is even the lightest touch can cause harm.
Last week I took a break from dry ice cleaning to work on the “Virginia Gun,” an IX-inch Dahlgren shell gun which sits at the entrance to the Ironclad Revolution exhibit. It was recovered along with the USS Merrimack by the Confederates and was used aboard the renamed CSS Virginia during the Battle of Hampton Roads (1862). It is a fascinating object that draws a crowd. Unfortunately, it also tends to draw wandering hands. My job was to remove greasy fingerprints from the side of the barrel. This got me thinking about how we protect objects and how although we have “do not touch” signs around the museum, visitors might not understand why this is such an important rule.Read more
Earlier this year we conducted a survey of all the small metal objects waiting to be conserved. We assessed the condition of each, took a photo, and changed solutions. We also slated some objects for x-radiography.
There are three reasons these particular objects were singled out. First is to determine the condition of the object. When artifacts are submerged in seawater they are covered in a cement-like aggregate called concretion. This is a mixture of metal corrosion products, sediment, and sea life, including mollusk and corals. Concretions can be a thin hard shell scattered across a surface or entirely encase a group of objects in an amorphous lump. By x-raying these concretions we can:Read more