MAKE: PROJECTS Eccentric Cubicle The maze ended with a side exit point, which only required a 1" conduit union and an inner-tube rubber gasket to complete. This is going jolly smoothly, isn't it? [Figure 09.20] Fluid Delivery On Saturdays and Sundays, the Vancouver Flea Market operates out of a cavernous building on Terminal Street that originally housed a factory that made wings for Mosquito bombers during the Second World War. It's also about two blocks from a big-box home-improvement center. Guess where I spend a lot of time and money on the weekends? Anyway, the V.F.M. has about a hundred stalls, hawking every- thing from piles of miscellaneous junk pulled out of dumpsters a few hours earlier to polished displays of "vintage mid-20 th -cen- tury memorabilia." That particular phrase immediately makes me feel old, because I can remember buying remarkably similar items when they were new, hot and trendworthy. It's yer typical swap meet, in other words. There's a certain perverse thrill in finding the same item for sale at both flavours of stalls mentioned earlier, if only to marvel at the price differential. Case in point: the core component of my fog juice delivery system, the venerable "bubble lamp." Not the classic Nelson hanging globes from the 40s, nor the Mathmos LEDs-in-a- blob-of-silicone numbers currently in vogue, and definitely not the Noma Christmas jobbies with the methylene chloride cylinder and heat exchanger. I'm talking about the ones with an acrylic tube full of water and an aquarium pump pushing bubbles up into it -- mid-90s rec room standard equipment and provider of ambience to countless herbally enhanced presentations of Pink Floyd's greatest hits. You know the ones. They're still available in countless styles and sizes, and currently are balanced on the knife edge between "Whoa...that's hideous" and "OMIGOD! It's so kitschy -- I gotta have it." As it happens, on the particular Sunday of this build, I hap- pened upon identical examples of said bubble lamp at the VFM, one polished, plugged in and glowing proudly, the other shadeless, half empty and half buried in a cardboard box under an assortment of mismatched leather gloves. "Vintage mid-20th-century memorabilia" price? $50, bulb not included. "Any Item Fifty Cents, 3 for a Dollar" price? Uh... fifty cents. Can't you read the sign? Half a buck lighter, I headed home and assembled a pneumati- cally powered fluid delivery system in about 20 minutes (plus the time it took for the silicone goop to cure). [Figure 09.21] There are a few good reasons for using an air-driven sys- tem to deliver fluid. An automotive wiper fluid pump would Figure 09.19: A diagram actually worthy of the term "flowchart." Figure 09.20: Dunno how much longer I'm gona be able to resist using the stereotypical Canadian "hoser" reference. snug fit between the freezer packs and the lid of the container, then spent about 20 minutes figuring out a workable maze layout for the baffle system. [Figure 09.18] Once I had that pattern sussed, I glued scrap-wood battens in position to form slots to hold the freezer packs in position as the maze walls. I crammed six packs into the confines of the intercooler, giving me a quite reasonable 228 square inches of subzero surface area. [Figure 09.19] 262