Thomas Jefferson Papers

Horatio G. Spafford to Thomas Jefferson, 6 April 1815

From Horatio G. Spafford

Albany, 4 Mo. 6, 1815.

Respected Friend—

The work of Dr. Williams, of which I spoke, is a Second edition of that which thou hast seen, published in 1809, at Burlington Vt., in 2 8vo volumes, containing about 1000 pages. Much of it is written anew, & the additions are extensive & valuable. I know the Doctor would be highly gratified to have it read & applauded by thee. He prides himself on his Republican Sentiments, particularly in the 2d vol. of this edition.

Gen. S. Van Rensselaer, the proprietor of the Manor of Rensselaer Wyck,1 has a Chaise nearly finished, on my plan. The proportions as I propose. It will be in motion next week, when I shall close my Letter with an account of its success. Except to myself, the sight will be novel in Albany, & hundreds are curious & waiting to try it. I know that in overcoming a 6 inch obstacle, with a load of 500 pounds, at a standing draught, the wheel of 7 feet will effect an advantage, equal to 96 pounds, when compared with the wheel of 4 feet 8 inches: & I also know that on the crooked axle, the same power, that is, 250 pounds, carries the same load, with the same results, also at a standing draught. But, giving the impulse of motion, by permitting the wheels to roll a short distance before they meet the obstacle, there is also a gain in the cranked, over the straight axle, which is very considerable. I let the power fall over a pulley, in the above experiments. To carry the wheels of 4 feet 8 inches over the same obstacle, with the same load, I have to increase the power, (or weight over the pulley,) by the addition of 96 pounds to the power. The small wheels that I used, are a trifle short of 4 feet 8 inches diameter.

When the load & power are thus tried, first on the small, & then on the large wheels; first with straight & then with cranked axles; standing, & then in motion, when they meet the obstacle, I have a most complete series of experiments for demonstration: And such were the facts, on which my reasoning was founded.

When the wheels, loaded upon the straight axle, meet the obstacle, it is by a sudden stroke, which deadens the impulse; &, if they mount it, they do so by a joult as sudden;—when, on the contrary, the load is on the cranked axle, & the wheels meet the obstacle, the Shock is less violent, & the impulse acts with greater power, by a kind of eslastic effort: Nor is the joult near so great, in passing over.

The above experiments show that there is no loss of power, in employing the cranked axle, in order to reduce the height of the load, & the line of draught, raised too high by employing large wheels. And if this occasions no loss, it must effect a great gain;—by enabling me to employ large wheels, & by bringing the load nearer to the point of contact, the actual centre of motion: as well as by equalizing the draught, & the motion of the load. Every inequality of motion, increases the friction, & that in a greater degree than seems to have been considered.

Stages, which employ Jacks, (as they are called here by the Coach-Makers,) on which to fasten the leathers on which the body rests, have their loads from 2 to 3 feet above the centre of the wheels; & these of course are but low. The consequence of which is, a great disadvantage in the application of the power of the horses, and a loss of the power of at least one in five when passing over rough or uneven roads, by the increased friction occasioned by the position of the load. These Stages so frequently upset, that travelling in them excites general terror. At least 20 lives have been lost in this way, within the United States, during the last year. Were these vehicles constructed with wheels of 6 & 7 feet diameter, & their axles cranked to the ordinary or best line of draught for the horses, there would be little danger of upsetting, & I am confident the 4th or 5th horse might be spared from the team. A Stage proprietor here, proposes to make trial of my method. If my reasoning is correct, & my inferences fair, from numerous experiments, this subject well merits the attention of the Post-Master General. That Officer ought to, & probably would, consider the saving of lives deserving his2 attention; & he is the proper organ to foster such an improvement, as important to considerations of political economy. And if travelling in3 Stages were considered less tedious & tiresome, & more safe & free from danger, the travelling by them4 would increase, & the government would be enabled to make contracts for carrying the mails on better terms. I hope this subject may engage the attention of the intelligent Gentleman who conducts the concerns of the Post Office Department. Were he to encourage a fair trial on Some principal route, I am fully persuaded he would essentially contribute to the public interest. Between Washington & Baltimore, I found the roads excedingly bad; & there would be a good place to try improved Stages. Or, between this City & Schenectady;—if he would encourage the Contractors to try it, I would give the Right, & superintend the construction of a Carriage. The only objection to my construction, would be, that the Carriage would not turn on so little ground. Stages are made to go forward, & turning short, is but a little part of the object for which they are employed. A mason I once employed, objected to connecting the brick-work of my chimney back, in the fire place, by laying some of the bricks transversely, because of the difficulty of detaching the back end, when the back should need repairs: & when I persisted, proposed to use, for that purpose, Soft bricks!

4 Mo. 12, 1815.

The Chaise has been now, 3 days in motion, hundreds have been to examine it—& many have rode in it. I rode with the owner a few miles, today, on muddy & dry, rough & smooth, level & uneven roads, & the motion, & apparent ease to the horse fully satisfied us that the principles are correctly [. . .] in my pamphlet. We have no hesitation, nor do I believe any one has who has tried it, in believing that it effects a saving of full one quarter. The ease and uniformity of its motion, are truly astonishing. It sinks far less into the mud, raises less on the wheel, & throws very little. When the road would admit of it, we drove very fast, & immediately after passing through deep & soft mud: the top was turned back, & we concluded it did not throw So much mud as an ordinary wheel. The timber should be good for the Spokes, & they should preserve their width, pretty fully, down to the felloes. I wish some person in Virginia would try it immediately: & if any person would try it in a Stage, I would willingly give the Right. In deep roads, it will make a Saving of near one half. To a Stage Proprietor in Va who first tries it in a Stage, I will give Rights to the amount of the expense of altering his vehicle to this plan. I conclude, by renewed assurances of my esteem & respect.With offering an apology, for so long a Letter,

RC (MHi); one word illegible; endorsed by TJ as received 19 Apr. 1815 and so recorded in SJL. RC (DLC); address cover only; with PoC of TJ to Nathaniel Bowditch, 2 May 1815, on verso; addressed: “Hon. Thomas Jefferson, late President of the United States, Monticello, Virginia”; franked; postmarked Albany, 12 Apr.

1Spafford here left a blank and above it interlined “V. the Gazetteer of N.Y.,” with “V.” presumably an abbreviation for “vide” (“see”). Spafford wrote on Rensselaerwyck Manor in his Gazetteer of the State of New-York (Albany, 1813; Sowerby, description begins E. Millicent Sowerby, comp., Catalogue of the Library of Thomas Jefferson, 1952–59, 5 vols. description ends no. 4172), esp. 96–7, 116.

2Word interlined.

3Preceding two words interlined.

4Preceding two words interlined.

Index Entries

  • A Gazetteer of the State of New-York (H. G. Spafford) search
  • carriages; H. G. Spafford’s improvement to search
  • carriages; stagecoaches search
  • inventions; of H. G. Spafford search
  • Meigs, Return Jonathan (ca.1765–1825); as postmaster general search
  • Post Office, U.S.; and mail service search
  • Rensselaerwyck Manor (S. Van Rensselaer’s N.Y. estate) search
  • roads; poor condition of search
  • Spafford, Horatio Gates; A Gazetteer of the State of New-York search
  • Spafford, Horatio Gates; inventions of search
  • Spafford, Horatio Gates; letters from search
  • The Natural and Civil History of Vermont (S. Williams) search
  • Van Rensselaer, Stephen; and carriage of H. G. Spafford search
  • Van Rensselaer, Stephen; estate of search
  • Williams, Samuel (1743–1817); The Natural and Civil History of Vermont search