Pacific Guano Company

Pacific Guano Company

Company type	Private
Industry	Fertilizer manufacturing
Founded	1861
Founder	Maritime entrepreneurs
Defunct	1889
Headquarters	Boston, Massachusetts , United States
Area served	Pacific Ocean islands, Caribbean, South Carolina coast
Products	Superphosphate fertilizers ("Soluble Pacific Guano")
Number of employees	~85 (at Woods Hole plant)

Pacific Guano Company—also referred to as the Pacific Guano Company of Boston during its operation from 1861 to 1889—was an American enterprise incorporated in Massachusetts with a capital investment of . Headquartered in Boston, the company specialized in manufacturing fertilizer derived from guano collected on islands located throughout the Pacific Ocean, the Caribbean, and coastal areas near South Carolina. It held the distinction of being the leading U.S. producer of superphosphate fertilizers, leveraging fish byproducts and Charleston phosphate deposits to create its signature "Soluble Pacific Guano" superphosphate product.

The firm's ownership was distributed among investors residing in Massachusetts, New York, Maryland, South Carolina, and Georgia. Manufacturing operations were established at two primary sites: Woods Hole, Massachusetts and Charleston, South Carolina.

History

Founded in 1861 by maritime entrepreneurs intent on utilizing idle ships, the company acquired Howland Island in the Southern Pacific due to its abundant bird guano reserves. Initial processing took place on Spectacle Island within Boston Harbor, where guano was dried and packaged for distribution. The production technique was improved by incorporating fish waste to restore ammonia lost during exposure to weather, pioneering the use of menhaden chum as a fertilizer ingredient.

By 1863, operations shifted to Woods Hole with the goal of harvesting fish for oil extraction alongside guano processing. After five years, difficulties related to location led to abandonment of the fishery aspect; instead, fish scrap was procured from oil production facilities situated on Narragansett Bay and Long Island Sound.

By 1866, guano deposits on Howland Island were nearly exhausted and supplanted by phosphate of lime sourced initially from Swan Island and subsequently from phosphates found in South Carolina. The company transitioned completely from bird guano to mineral phosphates, which met production requirements effectively.

Factories

The enterprise maintained two principal manufacturing plants: one at Woods Hole, Massachusetts, and another near Charleston, South Carolina. Although both employed comparable numbers of workers, the Charleston facility operated at roughly two-thirds of Woods Hole’s production capacity.

Situated on Long Neck peninsula (present-day Penzance Point), the Woods Hole plant occupied nearly exclusively for guano processing and sulphuric acid manufacture essential for fertilizer production. The workforce numbered approximately 85 employees evenly divided among loading/unloading, manufacturing, and packing roles; mechanization gradually reduced labor needs while boosting output.

Operations were powered by a 120-horsepower steam engine complemented by hoisting machinery for cargo handling. Core raw materials included fish scrap, mineral phosphate of lime, sulphuric acid, kainite, and occasionally standard salt.

Annually, around 10,000 tons of fish scrap were acquired and stored in expansive sheds covering , with stacks reaching heights up to . Mineral phosphate sources primarily consisted of deposits from South Carolina’s Ashley and Cooper Rivers along with Chisholm's Island near Saint Helena Sound. Until southern U.S. sources reopened in the late 1860s, phosphate rock was also obtained from Swan Island and high-quality rock from Navassa Island.

Sulphuric acid was produced onsite using Sicilian sulphur imported through Boston as well as directly from Sicily. Approximately 1,200 tons of sulphur and 3,000 tons of acid were consumed yearly at a concentration standardized at 66 Baumé (specific gravity 1.7674). Storage facilities included three large lead-lined tanks with a combined volume of 185,000 cubic feet.

Prior reliance on imported acid delivered in carboys from Waltham and New Haven was supplanted by onsite acid production starting in 1866, resulting in significant cost savings. The company also utilized about 500 tons annually of Leopoldshall kainit (containing roughly 12% potash) mined in Germany as a recent replacement for coarse salt previously sourced from New Haven gunpowder factories.

The Charleston plant processed substantial amounts of menhaden scrap brought by vessels returning with South Carolina phosphates destined for the Woods Hole operation.

Production

The production procedure was relatively simple. Upon arrival, fish waste was stored after being blended with approximately 3% of its weight in kainite, which replaced the previously utilized common salt to inhibit fermentation and decay. Phosphate rock was pulverized into a fine powder using stone crushers and millstones, aided by hoppers and elevators.

The fish scrap was kept in one section of the factory, while the ground phosphate occupied another area. Sulfuric acid was transferred pneumatically into a nearby storage tank. Two patented mixers from Poole & Hunt, each capable of handling about one ton, were used for blending. The components were combined in ratios of 1,000 pounds phosphate, 900 pounds scrap, and between 300 and 450 pounds sulfuric acid. The mixing basins rotated rapidly as plows thoroughly agitated the mixture; this process lasted around 15 minutes. Following mixing, the guano was stored for six weeks to ensure complete chemical integration, then sifted through wire mesh, packed into 200-pound sacks, and readied for shipment at an output of roughly 600 bags per day.

Prior to utilizing the Poole & Hunt mixers, the blending was manually done with hoes in large vats. Early mechanical mixers were unsuccessful because caking caused wheels and blades to jam. Stubborn lumps that resisted screening were broken down using the Carr's disintegrator, which employed two wheels spinning at 600 RPM in opposite directions.

Criticism and controversy

The unpleasant odors emitted by the factories led to local grievances and legal disputes. In the case of Connecticut vs. Enoch Coe (1871), a federal court issued an injunction stopping manure production at Norwalk Harbor due to nuisance complaints. Similarly, in 1872, the Shelter Island Camp-meeting Association petitioned for factory shutdowns citing comparable concerns. Efforts to relocate operations from Woods Hole met resistance from the town of Falmouth, Massachusetts, where the company contributed significant tax revenue and provided employment for many residents, which prevented successful litigation.

Another company of the same name

Often referred to as the Pacific Guano Company, this organization was established in 1927 originally as Pacific Guano and Fertilizer Company. It experienced multiple rebrandings, including Brewer Chemical and Brewer Environmental Industries, and presently operates under the name BEI Hawaii. Headquartered in Honolulu, it also maintained offices in Berkeley and Los Angeles, California.

External links

• The Pacific Guano Company via Woods Hole Museum