https://www.herculeshistory.org/files/original/6da9f572b1dd1d6014db699cd3417456.png 86593e0a2052ebc542fc92170259da16 https://www.herculeshistory.org/files/original/dc7af1b2f420094c110912a3c4c4d320.jpg 6a4e3535d303750e543a017bb1ecce9f https://www.herculeshistory.org/files/original/65dbd7abeb366e81bd27dbc80ba55952.jpg 5714e58414c04f05a8fd6767614b22c9 https://www.herculeshistory.org/files/original/8f239eea2a5ea2381eeaf6feece73ae2.jpg 5c964483c1307d86f733c7b229ac8cc5 https://www.herculeshistory.org/files/original/86b52a4f313f138d346152e82f9ac7f4.JPG 692e1061911a01963029f1b38a10d62b https://www.herculeshistory.org/files/original/90edae770ea0a5eb57d391adfe48dfb3.pdf a5a677f403877bfb32cbd212a7d6a4f1 PDF Text Text From: Subject: Date: To: Lynn Fissell society@herculeshistory.org Fwd: Acid Vats January 10, 2018 at 8:38 PM Jay Tucker tucker1559@comcast.net, Stephen Lawton srlawton@icloud.com, Dean Brightman deantbright@hotmail.com, Susan Keeffe keeffe.susan@gmail.com Jay, Steve, Dean, and Susan, Here is the message that I received about acid vats and referred to at tonight's HHS meeting. Lynn ---------- Forwarded message ---------From: Lynn Fissell <society@herculeshistory.org> Date: Wed, Jan 3, 2018 at 8:36 AM Subject: Re: Acid Vats To: Bill Haller <Billhaller@charter.net> Thank you, Mr. Haller, for your very informative explanation and graphic images. I will share this with the members of the Hercules Historical Society. If we have questions, I will send them to you. Lynn Fissell Secretary Hercules Historical Society On Fri, Dec 29, 2017 at 11:43 AM, Bill Haller <Billhaller@charter.net> wrote: Attn: Randy Grandin Hello Randy, Bill Haller here, Randy, I‘m a chemist, historian and author here in Michigan’s former copper mining district. Between here and nearby iron mining areas, I’ve identified 18 NG and dynamite producing Company’s �Fireclay nitroglycerin reaction vessel Circa 1890 ‘s – Houghton County, Michigan �Circa 1890 ‘s – Houghton County, Michigan This vessel meets the criteria as described in Mowbray’s book entitled TRI-NITROGLYCERIN. As shown in Mowbray’s sketch the large siphon bottles on the shelves above and behind each reactor crock would contain 17 pounds of mixed acid (2:1 ratio of Sulphuric : Nitric). A small glass jar (above) held 2 pounds of 98% glycerin. An exhaust tube not shown in Mowbray’s sketch was manifolded from each reactor to withdraw nitrous oxide and dioxide fumes. One of the small ports was fitted with a long-stem thermometer, the other with the glass siphon feed tubes. Reactants were manually monitored to flow at a rate consistent with the cooling water troughs ability to maintain less than 5◦F. A ¼ inch glass tube supplied air (bubbler) from a 2¼ inch iron pipe. (later design iterations used a spinning disc for agitation) The entire reactor gallery was immersed in a wooden tub of flowing water and allowed to react for 1½ to 2 hours before being plunged via a bottom vessel valve (underwater) into a series of five tanks, two containing “soda water”[1] and three of rinse water; all part of Mowbray’s meticulous neutralization technique. several hundred-gallon vat of cold water below deck in the basement. Downstairs the mixture of nitroglycerine and any residual waste acid were neutralized with sodium bicarbonate and allowed to separate; the nitroglycerin again sinking to the bottom. [1] Soda water was for neutralization of residual acids. It’s undetermined whether it was sodium carbonate or bi-carbonate solution. � Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource HHS Industrial Subject The topic of the resource Changes in the use of the Hercules Works land over time Description An account of the resource All uses of land, including buildings, roads, railroads, waterborne facilities. Date A point or period of time associated with an event in the lifecycle of the resource 1878-2022 Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Hercules Powder Works Physical Object An inanimate, three-dimensional object or substance. Note that digital representations of, or surrogates for, these objects should use Moving Image, Still Image, Text or one of the other types. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Acid Vessels Subject The topic of the resource Ceramic vats, bottles or other vessels of types possibly used at California Powder Works Type The nature or genre of the resource Physical Object Processes