ANALYSIS OF THE LESSONS. 



Reptiles. 856. Vaso-dcntinc in the Pristis and Myliobatis. 857. Peculiarity and 

 demonstration of the Pristis. 858. The vaso-dentine best seen in longitudinal 

 section. 859. Ramified tubuli shown in transverse section. 860. Osteo-dentine 

 shown in the fossil tooth of a Shark. 861. The canals described : osteo-dentina 

 in the tooth of the Muscalonge. 



LESSON LVIIL THE SALIVARY GLANDS, p. 203. 



862. Salivary glands in the human subject enumerated. 863. The parotid. 

 864. The submaxillary glands. 865. The sublingual glands. 866. Their struc- 

 ture. 867. Structure of the lobules. 868. The ducts : the general application 

 of description. 869. These glands found in Reptiles, but divided. 870. Func- 

 tion of these glands. 871. Nature of their secretion. 872. Analogical infer- 

 ence in regard to their secretion respectively. 873. Necessity of masticating 

 the food. 874. The three properties of saliva. 875. The effect of saliva on 

 grass in a Cow's stomach. 876. These effects demonstrated by experiment. 

 877. Experiment made on a Caterpillar. 878. Can the stomach destroy the 

 living principle in organic matter ? 879. This property belongs exclusively to the 

 saliva. 



LESSON LIX. THE SALIVARY GLANDS, CONCLUDED, p. 205. 



880. Pain of a Mosquito bite. 881. What produces it ? 882. Why is the 

 bite of a Rattlesnake poisonous ? 883. If a Man be bitten by a Dog, &c., why 

 should he have hydrophobia? 884. These questions answered. 885. Saliva 

 harmless or fatal according to the method of its exhibition. 886. If a Mosquito 

 were larger, probable effects of its bite. 887. Pain inflicted by other Insects : 

 how caused. 888. Division of the salivary glands in the Reptiles significant. 

 889. Glands in the Boa Constrictor. 890. How he insalivates his food. 891. 

 Bite of a mad Dog not always fatal : bite of a sound Dog may be fatal. 892. 

 Distinct property in the glands respectively. 893. The phenomena of the dog's 

 accounted for. 894. This opinion supported. 895. The aid of Chemistry in- 

 voked : the teachings of comparative Anatomy important. 896. The third func- 

 tion of salivary glands explained. 897. Life destroying character of these glands 

 in Insects. 898. Why should Insects possess three pairs of these glands ? 899. 

 Salivary glands in Nepa. 900. Difficulties of the question. 901. These glands 

 misnamed by butchers. 902. The true sweetbread. 



LESSON LX. THE PROPERTIES OP THE GASTRIC JUICE AND Mucus, p. 208. 

 903. The saliva moistens dry food. 904. Gastric juice and mucus neces- 

 sary to healthy digestion. 905. Water dilutes the gastric juice and impairs its 

 function. 906. Its effect upon the capillary circulation. 907. Water contain- 

 ing much lime is unfit to drink. 908. Such water should be boiled : the reason 

 why. 909. Where the mucus tubes maybe found. 910. The capillaries in 

 connection with them. 911. Gastric' glands: where found: their function. 

 912. These glands less definite in Man than in other animals. 913. Glands from 

 the pylorus of a Dog. 914. The like from a total Calf. 



