The Bladderwrack, Or Kelpware, is a coarse-looking Seaweed found in heavy brown masses on most of our coasts. It is known quite commonly by the characteristic bladders studded about the blades of the branched, narrowish fronds; these bladders being full of a glutinous substance which makes the weed valuable both, as a medicinal remedy against the glandular troubles of scrofula, and as an external embrocation, when the fronds are bottled in rum; such a liniment is specially beneficial for strengthening the faulty limbs of rickety, or bandy-legged children. Dr. Russell has recorded excellent success in dispersing scrofulous enlargements by rubbing in the soapy resolvent mucus which is found within the vesicles of the Bladderwrack. He advises friction of the tumours with these vesicles bruised in the open palms, and afterwards washing the parts with sea-water from the ocean. Remarkably enough, it is reported by a professional diver that one of the strange effects of diving beneath deep water is the bad temper invariably felt while working at the bottom of the sea. As this sensation passes away almost always immediately after the surface is again reached, it is probably caused by the pressure of the air affecting the lungs, and through them the circulation of blood in the brain.

Per contra, the exhilaration, and good temper of the mountain climber, represent quite opposite feelings, as derived from precisely different physical conditions. In this way the passion which seems to infatuate some enthusiastic mountain climbers, time after time, may be accounted for. An analysis of the Bladderwrack has shown it to contain an empyreumatic oil, sulphur, earthy salts, some iron, and iodine freely; thus it is very rich in anti-scrofulous elements. The fluid extract of this Seaweed has the long-standing reputation of safely, and surely, diminishing the bodily fat when in excess. It is given for such purpose three times a day, shortly after meals, in doses of from one to four teaspoonfuls. The remedy must be continued perseveringly, whilst cutting down the supplies of fat, starchy foods, sugar, and malt liquors. When taken in a like way, (or in the concentrated form of a bolus, if preferred), the Bladderwrack extract will specifically relieve rheumatic pains. Furthermore, a sea-pod liniment is dispensed by many seaside chemists; also a sea-pod essence for applying wet on a compress, towards dispelling strumous tumours, goitre, and enlarged neck glands; likewise for old strains, and bruises.

It is by reason of its contained bromine, and iodine, as harmless remedial elements, the Bladderwrack (Fucus vesiculosus) acts in reducing fatness by imparting a stimulation of the absorbent bodily glands to increased activity. In common with the other Fuci it furnishes mannite, an odorous oil, a bitter principle, mucilage, and ash (embodying the bromine, and iodine). For internal use a decoction may be made with from two to four drachms of the weed to a pint of water, boiled together for a few minutes; and for external application, to enlarged or hardened glands, the bruised weed may be applied as a cold poultice. This Seaweed comes to perfection only during early, and middle summer. The kelp, or ash, of the weed is an impure carbonate of soda, containing sulphate, and chloride of sodium, with a little charcoal. Persons inclined to be inconveniently fat may at the same time profitably employ a partial, or modified Banting system of diet. Abstinence from sugar, a sparing use of bread (unless toasted, thin, and chippy), likewise of potatoes, and pastry, with a liberal supply of lean meat, whilst plenty of active outdoor exercise is taken, ought to sufficiently restrain the proportions of most individuals within comfortable limits.