How Do Mines Explode? Understanding Risk in European Mining Doctrine, 1803-1906.

Historians of risk and disaster have paid little attention to coal mining-an industry characterized by extreme risks and disasters-even though coal mine operators were concerned with the causes of explosions throughout the nineteenth and early twentieth centuries. This article goes beyond nationally oriented mining scholarship on coal mine safety and regulations to examine one form of industrial risk: how did European researchers understand the role of coal dust in mine explosions. It describes the complex factors involved in applying science and technology methodologies to solve industrial risk in this dangerous sector. It traces European countries shifting after 1882 to new types of mine experimentation sponsored by the state and mine owners to better mimic real-life situations, while French mining researchers continued to defend work in laboratory settings. French researchers converged methodologically with their colleagues only after the French Courrières mine catastrophe in 1906.

Effects of early health-insurance programs on European mortality and fertility trends.

In this study, we examined the mortality and fertility effects of the early health-insurance programs sponsored by several European governments in the course of the demographic transition. Three sets of effects were hypothesized, and tested with data for five countries, covering the 1875-1913 period. First, although initially small, the growing health-insurance coverage of national populations accelerated longer-term downtrends in mortality. It not only expanded access to health care, but also helped in disseminating health information and awareness. Second, widening coverage also had an opposite effect on fertility; by lowering the costs of bearing and rearing children, it acted to slow the ongoing downtrend in marital fertility. Third, there was a diverse set of interactions between the mortality and fertility effects. Improved prospects for the survival of infants and children weakened parents' motivation to produce "extra" offspring to offset losses to mortality and to insure against future losses. Child survival was further enhanced by longer intervals between births and fewer children per family. However, the reduced cost of children tended to dilute these antenatal effects. Our regression results supported the expected pattern of partial effects, but simulations were needed to gauge the total impacts of health-insurance. Two sets of simulations were conducted: first, historical simulations, which closely tracked the actual experience of each sample country; second, counterfactuals, in which health-insurance coverage was set at zero for the entire time period. Comparisons of the historical and counterfactual simulations clearly indicated that health-insurance accelerated the downtrend in mortality, but slightly retarded the secular decline in marital fertility. These effects varied in magnitude, but not in direction, among the sample countries.

Social insurance claims as morbidity estimates: sickness or absence?

Historians have closely examined sickness claims by members of British friendly societies. Hoping that insurance records may offer insight into past health conditions, they have generally found that sickness rates increased as mortality rates declined. Aggregated fund level data from a variety of continental sickness insurance programmes from 1885 to 1908 cast doubt on this research strategy. Mortality rates fell among all funds with available data, but absenteeism trended in both directions in different groups of sick funds. Among funds that took in workers who were required to buy sickness insurance, absenteeism rose over time. Among funds in which membership was voluntary, absenteeism fell. To explain these differing trends, I note that voluntary funds attracted older and sicker workers and that the resulting financial problems made it difficult for them to pay out benefits. Social insurance claim records are so heavily influenced by governmental requirements and financial concerns that they may be better understood as records of worker absence rather than of morbidity.

Height and weight of early 20th century Filipino men.

BACKGROUND: Recent anthropometric studies of Filipinos have concentrated on women and children. While present-day studies of Filipino men are few, scattered sources of historical height and weight samples exist and can be studied to estimate a rough baseline for comparison, as well as to study trends in the past. AIM: This paper estimates heights and weights of men in the Philippines about a century ago. Height-by-age profiles and comparisons to contemporary populations in south-east Asia as well as present day Filipinos provide context. SUBJECTS AND METHODS: One sample consisted of 843 prisoners from throughout the islands, who were measured by an American anthropologist in Manila. A previously overlooked published source included measurements of 1016 seamen, police and prison guards, and civil servants in Manila. A contemporary source also measured 100 relatively remote Igorrote in Luzon. RESULTS: Average heights fell in a relatively narrow range of 1.60-1.62 m, except for police who were subject to a minimum height requirement. Body mass index (BMI) fell in a broader range of 18.24-21.26. Some regional variation was also evident in the prisoner sample. Height-by-age profiles suggested some improvement in net nutritional conditions over the century. CONCLUSIONS: Heights of turn of the century Filipino men were not very different from men elsewhere in south-east Asia, nor from present-day Filipino men. To understand trends in heights over the longer term more samples of men in the present-day Philippines would be desirable.