Strophanthus. Sulphonal, and its homologues, whether described as trional, tetronal, or by any other trade name, mark, or designation. [_Added March 12, 1913._] All preparations or admixtures which are not included in Part I. of this schedule, and contain a poison within the meaning of the Pharmacy Acts, except preparations or admixtures the exclusion of which from this schedule is indicated by the words therein relating to carbolic acid, chloroform, and coca, and except such substances as come within the provisions of Section 5 of this Act. Memorandum.--Special importance attaches to the last paragraph of Part II. of the schedule, as the effect of that paragraph is to include in Part II. many preparations and admixtures of vegetable drugs which contain poisonous alkaloids, although the drugs containing them are not specified in the schedule. With those in Part I. a registration of the sale is compulsory, the purchaser must be known to or introduced by some person known to the vendor, and the purpose for which the poison is required, the date, the name and amount of the poison sold, the name and address of the buyer, and the entry must be signed by the purchaser and introducer. All substances in Parts I. and II. must be labelled by the vendor with a label bearing the name of the poison, the name and address of the seller, and the word “Poison”; but with those in Part II. no registration as in Part I. is required. In the sale of arsenic both the seller and purchaser must sign the entry, and the introducer must witness it. No arsenic can be legally sold to a person under the age of twenty-one years; nor may it be sold in quantities of less than 10 lbs. unless mixed with soot or indigo--one ounce of the former, or half an ounce of the latter, to each pound of arsenic. If quantities of over 10 lbs. be sold, and the soot or indigo would render it unfit for use in the way desired, then they may be omitted (_Arsenic Act_, 1851). =Classification of Poisons.=--A good and scientific classification of poisons is still wanted. The following simple general division, depending upon the chief effect, may be taken as guides by the student: (a) _Corrosives_--Local corrosion. (b) _Irritants_--Gastro-intestinal irritation. (c) _Neurotics_--Altered action of the nervous system. 1. INORGANIC _Corrosive_--Sulphuric acid, &c. _Irritant_--Arsenic, &c. 2. ORGANIC _Irritant_--Savin, Cantharides. _Affecting Brain_--Opium. _Affecting Spinal Cord_--Strychnia. _Affecting Heart_--Digitalis. _Affecting Lungs_--Carbonic acid. (Guy.)