Prodigious Propagation

Gardener's Magazine 6: 427-428 (1830)
Elles: On the Culture of the Rosa odorata, the Sweet or Tea-scented Rose.
The following mode of propagation is easy and expeditious:— Put a plant or two into the hot-house in January or February, and there will soon be some young shoots: as soon as they have three or four leaves, take them off, no matter how tender or succulent, but never remove or shorten a leaf. Having prepared your cuttings, put them into sand, with a glass over them, in the same heat as the plants, and in three weeks they will be ready to be potted off. Thus continue taking fresh cuttings, or topping the cuttings already struck, till there are as many as you want. I propagated upwards of 100 plants in one season, from a small plant which only afforded three cuttings at the commencement.

Gardener's Magazine 9: 524 (1833)
Mr. Brown is celebrated for having raised two roses of the Bengal kind, viz., Brown's celestial and Brown's superb. They are both roses which grow with great vigour, and they are peculiarly susceptible of training as pyramids. There is here a large stock of that scarce rose, the yellow Noisette, obtained by grafting portions of shoots, containing only a single bud, on stocks of Brown's superb. This is an invention of one of the Messrs. Brown. The scion is not above an inch in length, and it is put on the stock, in the whip-grafting manner, close by the surface of the ground. The stock is of the wood of the former year, and the scion of the current year. Excellent and saleable plants are thus produced the very first season.

Gardener's Magazine 9: 698 (1833)
Chinese Roses may be propagated from single Buds, as Grape Vines are propagated. — The single bud, with a quarter of an inch of the stem both above and below it, is placed just under the soil, under a bell glass; the leafstalks and leaves standing upright as in a cutting. A single bud of Rosa semperflorens sanguinea was planted on July 26., and on Sept. 8. the bud had grown nearly four inches, and a blossom bud was formed. On Oct. 9. it was six inches high, and side shoots were being produced. Charles M. Willich. London, Oct. 23. 1833.

The Magazine of Horticulture 26: 40 (Jan. 1860)
[Hibberd's] description of the method of striking roses from eyes in the fashion of a grape vine, was particularly interesting. The buds were to be taken at the same season and in the same manner as for budding on the Briar, that is from half ripe wood, the buds of which had not started. The leaf was not to be secured: nor was the wood to be taken out of the shield, but every bud with its attached bark and leaves was to be planted in pure sand with a little peat under it for the first roots to work into, and then covered with a bell glass. In this way scarce roses would be multiplied readily.

D.T.F. (1887) recommended a similar technique for 'Boule de Neige' among others:
As Mr. Girdlestone points out, it does not root very readily on its own roots. Buds of it, however, may be rooted pretty readily. Well-ripened buds may be prepared as follows, and inserted in heat in July or August, or December or January: Pieces of wood about an inch long should be chosen. Cut the section straight across at each end, leaving the bud in the centre. Then remove about a third of the circumference of the wood from the under side of the bud. Place these on the surface of a pot or pan, and cover all but the bud over with fine soil or sand, making all as firm as possible. Cover with a bell-glass or plunge in a close hot-bed at a temperature of 65 or 70. Keep close till rooted, then gradually expose to more air; pot off when fairly rooted, and grow on in a close genial atmosphere till quite established.

The London Magazine 24: 497 (1755)
Mr. Hubbard, of Harby, in Leicestershire, had produced from 1 common grey pea, 417 peascods, and 356 of the peascods had peas in them that it was thought would grow and produce 2000 peas.

Palmer: Great Division of Wheat by its Roots (1843)
From one plant multiplied by root separation, a crop "was thrashed this week, and the weight is 2 1/2 lbs., which, according to the preceding calculation, consists of 22,000 grains. The wheat sown is known by the name of Eclipse."

Bennett: The Early Rose Potato (1869)
In April last I purchased 1 lb. (four tubers) of this variety, from which I made 132 sets.

Strong: Unprecedented Propagation of Early Rose Potato (1869)
From 6 pounds of tubers, "As fast as these plants made shoots which could be taken without serious loss to the parent-plant, they were removed, and placed in the propagating-bed, as before. Thus the process was repeated as late even as to the 5th of August. At first, it was from a small beginning, and, of course, a slow progress. But, as the case came under the rule of geometrical progression, on the 20th of July we reached the limit of capacity of our propagating-bed, which was fifteen thousand potato-cuttings; the leaves being large, and requiring space."

Bryan: Single-node cuttings of potatoes (1981)

Jones: Experiments in Root Separation, wheat (1922)
"July 12th he planted one kernel of Jones' Winter Fife wheat. July 31st he separated the root, making four hills from the side shoots. August 17th he divided again making 15 roots from the four. Sept. 4th he obtained 75 roots and by Sept. 24th these were increased to 300. Oct. 10th there were 505, October 31st they had increased to 900. Nov. 22nd he divided again having 1140 roots. Thirty-six of these winter-killed leaving 1104. Some of these had from 18 to 24 large heads. From this plat 27 1/2 pounds of wheat was threshed."

Macoboy: Miss Edith Cavell (1993)
"Launched by Gerrit de Ruiter in 1917 as a memorial to England's martyr nurse executed by the Germans, its little flowers are dark, velvety red. It was regarded as much the best red rose in the Polyantha class. Foliage is a dull dark green. Such are the vagaries of fashion that it proved almost impossible, a few years ago, to locate plants to grow on the lady's grave. It was a sport from 'Orléans Rose', and de Ruiter created speed records in propagating it: eighteen months after its discovery, he had grown 80,000 plants!"

Gerrit de Ruiter (1955) reported the story of 'Miss Edith Cavell' a bit differently:
"It was August 1914, when cutting budwood as a youth, I found a pretty red flowering shoot amongst a lot of pink polyantha roses, var. Orleans Rose. This I thought a great deviation of colour. Off this shoot a year later I had grown four bushes. This was the start of my first novelty, the polyantha rose Miss Edith Cavell."