The American side was better provided with instruments than the Spanish, having fourteen kinds in all.[149] They consisted of two zenith sectors (the larger one having nearly six feet radius), "both principally executed by ____ Rittenhouse," a large achromatic telescope made by Dolland of London, with terrestrial and celestial magnifying pieces, besides two small telescopes for taking signals, a transit and equal altitude instrument made by Ellicott and used in the New York and Washington surveys, a regulator made by Ellicott, an instrument of eight inches radius for taking horizontal angles, constructed by George Adams of London, three brass sextants, one by Ramsden being of "superior style," a surveying compass made by Benjamin Rittenhouse "upon the newest and most approved style," two "excellent" stop watches, two "excellent" cases of drawing and plotting instruments, two four-sided copper lanterns for tracing the meridians and directions during celestial observations, an apparatus to protect the water in using an artificial horizon, consisting of covered cup, &c., and two two-pole chains of common construction. On the Spanish side were only an "excellent" sextant, graduated by the vernier to 10 seconds, an astronomical circle executed by Traughton of London, itself "a portable observatory," "executed in a masterly manner," and an old surveying compass of poor construction. The sextant and circle had been the property of Dunbar, and were acquired from him by Governor Gayoso.