Many of the Zoos have them, but often they are only with a few of the animals. The Zoo has done alot of updating their site and park trying to compete with some of the larger Zoos. From what I could find out this Zoo also claims to be the oldest formal Zoo in the US.
What this means is that toluene will ignite with a lower amount of vapour in the air. So the upshot is that Hexane is more flammable but requires slightly more vapour in the air to ignite than does toluene. Edited to correct the flash point as the MSDS I looked for hexane quoted in Fahrenheit not Celsius. I have now converted the data.
Because cotton is a highly flammable fiber, the Nomex/cotton blend fabric containing more than 20% cotton is not self-extinguishable [3-4]. Therefore, a durable flame-retardant finishing treatment becomes necessary to make the Nomex/cotton blend flame-resistant if it contains more than 20% cotton fiber. Previously we developed a flame retardant finishing system for cotton based on a hydroxy-functional organophosphorus oligomer (HFPO) shown in Figure 1.