Exceptional. Scarlatinoid and papular. #State frequency and types of eruption resulting from the iodides (iodine).# Common. _Pustular_, but may be erythematous, papular, vesicular, bullous, tuberous, purpuric and hemorrhagic. Co-administration of arsenic or potassium bitartrate is thought to have a preventive influence in some cases. #Give the frequency and types of eruption observed to follow the administration of mercury.# Exceptional. Erythematous and erysipelatous. #Give the frequency and types of the cutaneous disturbance following the ingestion of opium (or morphia).# Not uncommon. Erythematous and _scarlatinoid_, and sometimes urticarial. #Mention the frequency and the types of eruption following the administration of quinine.# Not infrequent. Usually _erythematous_, but may be urticarial, erythemato-papular, and even purpuric. There is, in some instances, preceding or accompanying systemic disturbance. Furfuraceous or lamellar desquamation often follows. #State frequency and types of eruption resulting from the ingestion of salicylic acid.# Not common. Erythematous and urticarial; exceptionally, vesicular, pustular, bullous, and ecchymotic. #Give frequency and type of cutaneous disturbance due to the administration of stramonium.# Not common. Erythematous. #State frequency and types of eruption resulting from the administration of turpentine.# Not uncommon. _Erythematous_, and small-papular; exceptionally vesicular. #X-Ray Dermatitis.# #What several grades of x-ray dermatitis (x-ray burns, Rontgen-ray burns) are observed?# Three grades are usually described: erythema, superficial vesication, and necrosis. The first and second may come on shortly--a few hours to several days--after exposure; occasionally later. The third grade may present also in the first several days, but in many cases one to several weeks may elapse before it appears; it is quite commonly preceded by erythema and vesication. The necrosis may be superficial or deep, and quite usually results in a persistent ulcer covered by a leathery coating; it is usually painful. [Illustration: Fig. 15. _x_-ray burn] #Give the prognosis and treatment of x-ray dermatitis.# The first grade--the erythematous--usually disappears in one to ten days; the second grade requires one to several weeks, and may be quite sore and tender; the severe or necrotic burns are persistent, sometimes lasting for months and several years, with little tendency to spontaneous disappearance, and rebellious to treatment. Treatment of the milder types is that of erythema (_q. v._); the necrotic type occasionally demands thorough curetting and skin-grafting before it will heal. #Dermatitis Factitia.# (_Synonym:_ Feigned Eruptions.) #What do you understand by feigned eruptions?#