P.G Tait/Lord Kelvin. 1863-87 Covers, three from the Mathem...
P.G Tait/Lord Kelvin. 1863-87 Covers, three from the Mathematician and Physicist P.G Tait all signed or initialled (one with additional note added prior to posting on a forthcoming publication) all to the equally famous Mathematician and Physicist Prof. W. Thomson (Lord Kelvin) posted in Edinburgh franked 1d; the other cover from Cambridge to Prof. Tait in Edinburgh used by Tait to write an equation. (4).
P.G Tait/Lord Kelvin. 1863-87 Covers, three from the Mathematician and Physicist P.G Tait all signed or initialled (one with additional note added prior to posting on a forthcoming publication) all to the equally famous Mathematician and Physicist Prof. W. Thomson (Lord Kelvin) posted in Edinburgh franked 1d; the other cover from Cambridge to Prof. Tait in Edinburgh used by Tait to write an equation. (4).
