A steampunk society managed to develop functioning airships filled with helium, powered by a steam engine. They mine this helium from an underground reservoir along with other natural gas. What else can be assumed this society managed to develop?
Let's assume that steam power is what the society decided to invest everything into, along with clockwork technology.
Can we expect electric lamps on the streets? Steam-powered guns, cars, airplanes, submarines, trains? Would this society manage to develop an airship without ever investing in combustion engines and gunpowder?
Please excuse my poor knowledge of engineering. The society should mainly be steampunk since that's what I'm going for, so I would prefer everything to be powered by either steam or clockwork, we can thus assume that the society would naturally invest in that technology over combustion engines for example. But are there some inventions that are inevitable in a society so advanced it can make a helium-powered airship?